ember-runtime.js

(function() {
/*global __fail__*/

if ('undefined' === typeof Ember) {
  Ember = {};

  if ('undefined' !== typeof window) {
    window.Em = window.Ember = Em = Ember;
  }
}

/**
  Define an assertion that will throw an exception if the condition is not
  met.  Ember build tools will remove any calls to Ember.assert() when
  doing a production build.

  ## Examples

      #js:

      // pass a simple Boolean value
      Ember.assert('must pass a valid object', !!obj);

      // pass a function.  If the function returns false the assertion fails
      // any other return value (including void) will pass.
      Ember.assert('a passed record must have a firstName', function() {
        if (obj instanceof Ember.Record) {
          return !Ember.empty(obj.firstName);
        }
      });

  @static
  @function
  @param {String} desc
    A description of the assertion.  This will become the text of the Error
    thrown if the assertion fails.

  @param {Boolean} test
    Must return true for the assertion to pass.  If you pass a function it
    will be executed.  If the function returns false an exception will be
    thrown.
*/
Ember.assert = function(desc, test) {
  if ('function' === typeof test) test = test()!==false;
  if (!test) throw new Error("assertion failed: "+desc);
};


/**
  Display a warning with the provided message. Ember build tools will
  remove any calls to Ember.warn() when doing a production build.

  @static
  @function
  @param {String} message
    A warning to display.

  @param {Boolean} test
    An optional boolean or function. If the test returns false, the warning
    will be displayed.
*/
Ember.warn = function(message, test) {
  if (arguments.length === 1) { test = false; }
  if ('function' === typeof test) test = test()!==false;
  if (!test) Ember.Logger.warn("WARNING: "+message);
};

/**
  Display a deprecation warning with the provided message and a stack trace
  (Chrome and Firefox only). Ember build tools will remove any calls to
  Ember.deprecate() when doing a production build.

  @static
  @function
  @param {String} message
    A description of the deprecation.

  @param {Boolean} test
    An optional boolean or function. If the test returns false, the deprecation
    will be displayed.
*/
Ember.deprecate = function(message, test) {
  if (Ember && Ember.TESTING_DEPRECATION) { return; }

  if (arguments.length === 1) { test = false; }
  if ('function' === typeof test) { test = test()!==false; }
  if (test) { return; }

  if (Ember && Ember.ENV.RAISE_ON_DEPRECATION) { throw new Error(message); }

  var error, stackStr = '';

  // When using new Error, we can't do the arguments check for Chrome. Alternatives are welcome
  try { __fail__.fail(); } catch (e) { error = e; }

  if (error.stack) {
    var stack;

    if (error['arguments']) {
      // Chrome
      stack = error.stack.replace(/^\s+at\s+/gm, '').
                          replace(/^([^\(]+?)([\n$])/gm, '{anonymous}($1)$2').
                          replace(/^Object.<anonymous>\s*\(([^\)]+)\)/gm, '{anonymous}($1)').split('\n');
      stack.shift();
    } else {
      // Firefox
      stack = error.stack.replace(/(?:\n@:0)?\s+$/m, '').
                          replace(/^\(/gm, '{anonymous}(').split('\n');
    }

    stackStr = "\n    " + stack.slice(2).join("\n    ");
  }

  Ember.Logger.warn("DEPRECATION: "+message+stackStr);
};



/**
  Display a deprecation warning with the provided message and a stack trace
  (Chrome and Firefox only) when the wrapped method is called.

  Ember build tools will not remove calls to Ember.deprecateFunc(), though
  no warnings will be shown in production.

  @static
  @function
  @param {String} message
    A description of the deprecation.

  @param {Function} func
    The function to be deprecated.
*/
Ember.deprecateFunc = function(message, func) {
  return function() {
    Ember.deprecate(message);
    return func.apply(this, arguments);
  };
};


window.ember_assert         = Ember.deprecateFunc("ember_assert is deprecated. Please use Ember.assert instead.",               Ember.assert);
window.ember_warn           = Ember.deprecateFunc("ember_warn is deprecated. Please use Ember.warn instead.",                   Ember.warn);
window.ember_deprecate      = Ember.deprecateFunc("ember_deprecate is deprecated. Please use Ember.deprecate instead.",         Ember.deprecate);
window.ember_deprecateFunc  = Ember.deprecateFunc("ember_deprecateFunc is deprecated. Please use Ember.deprecateFunc instead.", Ember.deprecateFunc);

})();

(function() {
// ==========================================================================
// Project:  Ember Metal
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
/*globals Em:true ENV */

if ('undefined' === typeof Ember) {
/**
  @namespace
  @name Ember
  @version 0.9.8.1

  All Ember methods and functions are defined inside of this namespace.
  You generally should not add new properties to this namespace as it may be
  overwritten by future versions of Ember.

  You can also use the shorthand "Em" instead of "Ember".

  Ember-Runtime is a framework that provides core functions for
  Ember including cross-platform functions, support for property
  observing and objects. Its focus is on small size and performance. You can
  use this in place of or along-side other cross-platform libraries such as
  jQuery.

  The core Runtime framework is based on the jQuery API with a number of
  performance optimizations.
*/

// Create core object. Make it act like an instance of Ember.Namespace so that
// objects assigned to it are given a sane string representation.
Ember = {};

// aliases needed to keep minifiers from removing the global context
if ('undefined' !== typeof window) {
  window.Em = window.Ember = Em = Ember;
}

}

// Make sure these are set whether Ember was already defined or not

Ember.isNamespace = true;

Ember.toString = function() { return "Ember"; };


/**
  @static
  @type String
  @default '0.9.8.1'
  @constant
*/
Ember.VERSION = '0.9.8.1';

/**
  @static
  @type Hash
  @constant

  Standard environmental variables.  You can define these in a global `ENV`
  variable before loading Ember to control various configuration
  settings.
*/
Ember.ENV = 'undefined' === typeof ENV ? {} : ENV;


// ..........................................................
// BOOTSTRAP
//

/**
  @static
  @type Boolean
  @default true
  @constant

  Determines whether Ember should enhances some built-in object
  prototypes to provide a more friendly API.  If enabled, a few methods
  will be added to Function, String, and Array.  Object.prototype will not be
  enhanced, which is the one that causes most troubles for people.

  In general we recommend leaving this option set to true since it rarely
  conflicts with other code.  If you need to turn it off however, you can
  define an ENV.EXTEND_PROTOTYPES config to disable it.
*/
Ember.EXTEND_PROTOTYPES = (Ember.ENV.EXTEND_PROTOTYPES !== false);


/**
  @static
  @type Boolean
  @default Ember.EXTEND_PROTOTYPES
  @constant

  Determines whether Ember should add ECMAScript 5 shims to older browsers.
*/
Ember.SHIM_ES5 = (Ember.ENV.SHIM_ES5 === false) ? false : Ember.EXTEND_PROTOTYPES;


/**
  @static
  @type Boolean
  @default false
  @constant

  Determines whether computed properties are cacheable by default.
  In future releases this will default to `true`. For the 1.0 release,
  the option to turn off caching by default will be removed entirely.

  When caching is enabled by default, you can use `volatile()` to disable
  caching on individual computed properties.
*/
Ember.CP_DEFAULT_CACHEABLE = !!Ember.ENV.CP_DEFAULT_CACHEABLE;

/**
  @static
  @type Boolean
  @default false
  @constant

  Determines whether views render their templates using themselves
  as the context, or whether it is inherited from the parent. In
  future releases, this will default to `true`. For the 1.0 release,
  the option to have views change context by default will be removed entirely.

  If you need to update your application to use the new context rules, simply
  prefix property access with `view.`:

      // Before:
      {{#each App.photosController}}
        Photo Title: {{title}}
        {{#view App.InfoView contentBinding="this"}}
          {{content.date}}
          {{content.cameraType}}
          {{otherViewProperty}}
        {{/view}}
      {{/each}}

      // After:
      {{#each App.photosController}}
        Photo Title: {{title}}
        {{#view App.InfoView}}
          {{date}}
          {{cameraType}}
          {{view.otherViewProperty}}
        {{/view}}
      {{/each}}
*/
Ember.VIEW_PRESERVES_CONTEXT = !!Ember.ENV.VIEW_PRESERVES_CONTEXT;

/**
  Empty function.  Useful for some operations.

  @returns {Object}
  @private
*/
Ember.K = function() { return this; };

/**
  @namespace
  @name window
  @description The global window object
*/


// Stub out the methods defined by the ember-debug package in case it's not loaded

if ('undefined' === typeof Ember.assert) { Ember.assert = Ember.K; }
if ('undefined' === typeof Ember.warn) { Ember.warn = Ember.K; }
if ('undefined' === typeof Ember.deprecate) { Ember.deprecate = Ember.K; }
if ('undefined' === typeof Ember.deprecateFunc) {
  Ember.deprecateFunc = function(_, func) { return func; };
}

// These are deprecated but still supported

if ('undefined' === typeof ember_assert) { window.ember_assert = Ember.K; }
if ('undefined' === typeof ember_warn) { window.ember_warn = Ember.K; }
if ('undefined' === typeof ember_deprecate) { window.ember_deprecate = Ember.K; }
if ('undefined' === typeof ember_deprecateFunc) {
  /** @private */
  window.ember_deprecateFunc = function(_, func) { return func; };
}


// ..........................................................
// LOGGER
//

/**
  @class

  Inside Ember-Metal, simply uses the window.console object.
  Override this to provide more robust logging functionality.
*/
Ember.Logger = window.console || { log: Ember.K, warn: Ember.K, error: Ember.K };

})();



(function() {
// ==========================================================================
// Project:  Ember Metal
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
/*globals Node */
/**
  @class

  Platform specific methods and feature detectors needed by the framework.

  @name Ember.platform
*/
var platform = Ember.platform = {} ;

/**
  Identical to Object.create().  Implements if not available natively.
  @memberOf Ember.platform
  @name create
*/
platform.create = Object.create;

if (!platform.create) {
  /** @private */
  var O_ctor = function() {},
      O_proto = O_ctor.prototype;

  platform.create = function(obj, descs) {
    O_ctor.prototype = obj;
    obj = new O_ctor();
    O_ctor.prototype = O_proto;

    if (descs !== undefined) {
      for(var key in descs) {
        if (!descs.hasOwnProperty(key)) continue;
        platform.defineProperty(obj, key, descs[key]);
      }
    }

    return obj;
  };

  platform.create.isSimulated = true;
}

/** @private */
var defineProperty = Object.defineProperty;
var canRedefineProperties, canDefinePropertyOnDOM;

// Catch IE8 where Object.defineProperty exists but only works on DOM elements
if (defineProperty) {
  try {
    defineProperty({}, 'a',{get:function(){}});
  } catch (e) {
    /** @private */
    defineProperty = null;
  }
}

if (defineProperty) {
  // Detects a bug in Android <3.2 where you cannot redefine a property using
  // Object.defineProperty once accessors have already been set.
  /** @private */
  canRedefineProperties = (function() {
    var obj = {};

    defineProperty(obj, 'a', {
      configurable: true,
      enumerable: true,
      get: function() { },
      set: function() { }
    });

    defineProperty(obj, 'a', {
      configurable: true,
      enumerable: true,
      writable: true,
      value: true
    });

    return obj.a === true;
  })();

  // This is for Safari 5.0, which supports Object.defineProperty, but not
  // on DOM nodes.
  /** @private */
  canDefinePropertyOnDOM = (function(){
    try {
      defineProperty(document.createElement('div'), 'definePropertyOnDOM', {});
      return true;
    } catch(e) { }

    return false;
  })();

  if (!canRedefineProperties) {
    /** @private */
    defineProperty = null;
  } else if (!canDefinePropertyOnDOM) {
    /** @private */
    defineProperty = function(obj, keyName, desc){
      var isNode;

      if (typeof Node === "object") {
        isNode = obj instanceof Node;
      } else {
        isNode = typeof obj === "object" && typeof obj.nodeType === "number" && typeof obj.nodeName === "string";
      }

      if (isNode) {
        // TODO: Should we have a warning here?
        return (obj[keyName] = desc.value);
      } else {
        return Object.defineProperty(obj, keyName, desc);
      }
    };
  }
}

/**
  Identical to Object.defineProperty().  Implements as much functionality
  as possible if not available natively.

  @memberOf Ember.platform
  @name defineProperty
  @param {Object} obj The object to modify
  @param {String} keyName property name to modify
  @param {Object} desc descriptor hash
  @returns {void}
*/
platform.defineProperty = defineProperty;

/**
  Set to true if the platform supports native getters and setters.

  @memberOf Ember.platform
  @name hasPropertyAccessors
*/
platform.hasPropertyAccessors = true;

if (!platform.defineProperty) {
  platform.hasPropertyAccessors = false;

  platform.defineProperty = function(obj, keyName, desc) {
    Ember.assert("property descriptor cannot have `get` or `set` on this platform", !desc.get && !desc.set);
    obj[keyName] = desc.value;
  };

  platform.defineProperty.isSimulated = true;
}

})();



(function() {
// ==========================================================================
// Project:  Ember Metal
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
// ..........................................................
// GUIDS
//

// Used for guid generation...
var GUID_KEY = '__ember'+ (+ new Date());
var uuid, numberCache, stringCache;

uuid         = 0;
numberCache  = [];
stringCache  = {};

var GUID_DESC = Ember.GUID_DESC = {
  configurable: true,
  writable: true,
  enumerable: false
};

var o_defineProperty = Ember.platform.defineProperty;
var o_create = Ember.platform.create;

/**
  @private
  @static
  @type String
  @constant

  A unique key used to assign guids and other private metadata to objects.
  If you inspect an object in your browser debugger you will often see these.
  They can be safely ignored.

  On browsers that support it, these properties are added with enumeration
  disabled so they won't show up when you iterate over your properties.
*/
Ember.GUID_KEY = GUID_KEY;

/**
  @private

  Generates a new guid, optionally saving the guid to the object that you
  pass in.  You will rarely need to use this method.  Instead you should
  call Ember.guidFor(obj), which return an existing guid if available.

  @param {Object} obj
    Optional object the guid will be used for.  If passed in, the guid will
    be saved on the object and reused whenever you pass the same object
    again.

    If no object is passed, just generate a new guid.

  @param {String} prefix
    Optional prefix to place in front of the guid.  Useful when you want to
    separate the guid into separate namespaces.

  @returns {String} the guid
*/
Ember.generateGuid = function(obj, prefix) {
  if (!prefix) prefix = 'ember';
  var ret = (prefix + (uuid++));
  if (obj) {
    GUID_DESC.value = ret;
    o_defineProperty(obj, GUID_KEY, GUID_DESC);
    GUID_DESC.value = null;
  }

  return ret ;
};

/**
  @private

  Returns a unique id for the object.  If the object does not yet have
  a guid, one will be assigned to it.  You can call this on any object,
  Ember.Object-based or not, but be aware that it will add a _guid property.

  You can also use this method on DOM Element objects.

  @method
  @param obj {Object} any object, string, number, Element, or primitive
  @returns {String} the unique guid for this instance.
*/
Ember.guidFor = function(obj) {

  // special cases where we don't want to add a key to object
  if (obj === undefined) return "(undefined)";
  if (obj === null) return "(null)";

  var cache, ret;
  var type = typeof obj;

  // Don't allow prototype changes to String etc. to change the guidFor
  switch(type) {
    case 'number':
      ret = numberCache[obj];
      if (!ret) ret = numberCache[obj] = 'nu'+obj;
      return ret;

    case 'string':
      ret = stringCache[obj];
      if (!ret) ret = stringCache[obj] = 'st'+(uuid++);
      return ret;

    case 'boolean':
      return obj ? '(true)' : '(false)';

    default:
      if (obj[GUID_KEY]) return obj[GUID_KEY];
      if (obj === Object) return '(Object)';
      if (obj === Array)  return '(Array)';
      return Ember.generateGuid(obj, 'ember');
  }
};


// ..........................................................
// META
//

var META_DESC = {
  writable:    true,
  configurable: false,
  enumerable:  false,
  value: null
};

var META_KEY = Ember.GUID_KEY+'_meta';

/**
  The key used to store meta information on object for property observing.

  @static
  @property
*/
Ember.META_KEY = META_KEY;

// Placeholder for non-writable metas.
var EMPTY_META = {
  descs: {},
  watching: {}
};

if (Object.freeze) Object.freeze(EMPTY_META);

var createMeta = Ember.platform.defineProperty.isSimulated ? o_create : (function(meta) { return meta; });

/**
  @private
  @function

  Retrieves the meta hash for an object.  If 'writable' is true ensures the
  hash is writable for this object as well.

  The meta object contains information about computed property descriptors as
  well as any watched properties and other information.  You generally will
  not access this information directly but instead work with higher level
  methods that manipulate this hash indirectly.

  @param {Object} obj
    The object to retrieve meta for

  @param {Boolean} writable
    Pass false if you do not intend to modify the meta hash, allowing the
    method to avoid making an unnecessary copy.

  @returns {Hash}
*/
Ember.meta = function meta(obj, writable) {

  var ret = obj[META_KEY];
  if (writable===false) return ret || EMPTY_META;

  if (!ret) {
    o_defineProperty(obj, META_KEY, META_DESC);
    ret = obj[META_KEY] = createMeta({
      descs: {},
      watching: {},
      values: {},
      lastSetValues: {},
      cache:  {},
      source: obj
    });

    // make sure we don't accidentally try to create constructor like desc
    ret.descs.constructor = null;

  } else if (ret.source !== obj) {
    ret = o_create(ret);
    ret.descs    = o_create(ret.descs);
    ret.values   = o_create(ret.values);
    ret.watching = o_create(ret.watching);
    ret.lastSetValues = {};
    ret.cache    = {};
    ret.source   = obj;

    o_defineProperty(obj, META_KEY, META_DESC);
    ret = obj[META_KEY] = createMeta(ret);
  }
  return ret;
};

Ember.getMeta = function getMeta(obj, property) {
  var meta = Ember.meta(obj, false);
  return meta[property];
};

Ember.setMeta = function setMeta(obj, property, value) {
  var meta = Ember.meta(obj, true);
  meta[property] = value;
  return value;
};

/**
  @private

  In order to store defaults for a class, a prototype may need to create
  a default meta object, which will be inherited by any objects instantiated
  from the class's constructor.

  However, the properties of that meta object are only shallow-cloned,
  so if a property is a hash (like the event system's `listeners` hash),
  it will by default be shared across all instances of that class.

  This method allows extensions to deeply clone a series of nested hashes or
  other complex objects. For instance, the event system might pass
  ['listeners', 'foo:change', 'ember157'] to `prepareMetaPath`, which will
  walk down the keys provided.

  For each key, if the key does not exist, it is created. If it already
  exists and it was inherited from its constructor, the constructor's
  key is cloned.

  You can also pass false for `writable`, which will simply return
  undefined if `prepareMetaPath` discovers any part of the path that
  shared or undefined.

  @param {Object} obj The object whose meta we are examining
  @param {Array} path An array of keys to walk down
  @param {Boolean} writable whether or not to create a new meta
    (or meta property) if one does not already exist or if it's
    shared with its constructor
*/
Ember.metaPath = function(obj, path, writable) {
  var meta = Ember.meta(obj, writable), keyName, value;

  for (var i=0, l=path.length; i<l; i++) {
    keyName = path[i];
    value = meta[keyName];

    if (!value) {
      if (!writable) { return undefined; }
      value = meta[keyName] = { __ember_source__: obj };
    } else if (value.__ember_source__ !== obj) {
      if (!writable) { return undefined; }
      value = meta[keyName] = o_create(value);
      value.__ember_source__ = obj;
    }

    meta = value;
  }

  return value;
};

/**
  @private

  Wraps the passed function so that `this._super` will point to the superFunc
  when the function is invoked.  This is the primitive we use to implement
  calls to super.

  @param {Function} func
    The function to call

  @param {Function} superFunc
    The super function.

  @returns {Function} wrapped function.
*/
Ember.wrap = function(func, superFunc) {

  function K() {}

  var newFunc = function() {
    var ret, sup = this._super;
    this._super = superFunc || K;
    ret = func.apply(this, arguments);
    this._super = sup;
    return ret;
  };

  newFunc.base = func;
  return newFunc;
};

/**
  Returns true if the passed object is an array or Array-like.

  Ember Array Protocol:

    - the object has an objectAt property
    - the object is a native Array
    - the object is an Object, and has a length property

  Unlike Ember.typeOf this method returns true even if the passed object is
  not formally array but appears to be array-like (i.e. implements Ember.Array)

      Ember.isArray(); // false
      Ember.isArray([]); // true
      Ember.isArray( Ember.ArrayProxy.create({ content: [] }) ); // true

  @param {Object} obj The object to test
  @returns {Boolean}
*/
Ember.isArray = function(obj) {
  if (!obj || obj.setInterval) { return false; }
  if (Array.isArray && Array.isArray(obj)) { return true; }
  if (Ember.Array && Ember.Array.detect(obj)) { return true; }
  if ((obj.length !== undefined) && 'object'===typeof obj) { return true; }
  return false;
};

/**
  Forces the passed object to be part of an array.  If the object is already
  an array or array-like, returns the object.  Otherwise adds the object to
  an array.  If obj is null or undefined, returns an empty array.

      Ember.makeArray();          => []
      Ember.makeArray(null);      => []
      Ember.makeArray(undefined); => []
      Ember.makeArray('lindsay'); => ['lindsay'] 
      Ember.makeArray([1,2,42]);  => [1,2,42]

      var controller = Ember.ArrayProxy.create({ content: [] });
      Ember.makeArray(controller) === controller;   => true

  @param {Object} obj the object
  @returns {Array}
*/
Ember.makeArray = function(obj) {
  if (obj === null || obj === undefined) return [];
  return Ember.isArray(obj) ? obj : [obj];
};



})();



(function() {
// ==========================================================================
// Project:  Ember Metal
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var USE_ACCESSORS = Ember.platform.hasPropertyAccessors && Ember.ENV.USE_ACCESSORS;
Ember.USE_ACCESSORS = !!USE_ACCESSORS;

var meta = Ember.meta;

// ..........................................................
// GET AND SET
//
// If we are on a platform that supports accessors we can get use those.
// Otherwise simulate accessors by looking up the property directly on the
// object.

var get, set;

/** @private */
get = function get(obj, keyName) {
  if (keyName === undefined && 'string' === typeof obj) {
    keyName = obj;
    obj = Ember;
  }

  if (!obj) return undefined;
  var ret = obj[keyName];
  if (ret===undefined && 'function'===typeof obj.unknownProperty) {
    ret = obj.unknownProperty(keyName);
  }
  return ret;
};

/** @private */
set = function set(obj, keyName, value) {
  if (('object'===typeof obj) && !(keyName in obj)) {
    if ('function' === typeof obj.setUnknownProperty) {
      obj.setUnknownProperty(keyName, value);
    } else if ('function' === typeof obj.unknownProperty) {
      obj.unknownProperty(keyName, value);
    } else obj[keyName] = value;
  } else {
    obj[keyName] = value;
  }
  return value;
};

if (!USE_ACCESSORS) {

  var o_get = get, o_set = set;

  /** @private */
  get = function(obj, keyName) {
    if (keyName === undefined && 'string' === typeof obj) {
      keyName = obj;
      obj = Ember;
    }

    Ember.assert("You need to provide an object and key to `get`.", !!obj && keyName);

    if (!obj) return undefined;
    var desc = meta(obj, false).descs[keyName];
    if (desc) return desc.get(obj, keyName);
    else return o_get(obj, keyName);
  };

  /** @private */
  set = function(obj, keyName, value) {
    Ember.assert("You need to provide an object and key to `set`.", !!obj && keyName !== undefined);
    var desc = meta(obj, false).descs[keyName];
    if (desc) desc.set(obj, keyName, value);
    else o_set(obj, keyName, value);
    return value;
  };

}

/**
  @function

  Gets the value of a property on an object.  If the property is computed,
  the function will be invoked.  If the property is not defined but the
  object implements the unknownProperty() method then that will be invoked.

  If you plan to run on IE8 and older browsers then you should use this
  method anytime you want to retrieve a property on an object that you don't
  know for sure is private.  (My convention only properties beginning with
  an underscore '_' are considered private.)

  On all newer browsers, you only need to use this method to retrieve
  properties if the property might not be defined on the object and you want
  to respect the unknownProperty() handler.  Otherwise you can ignore this
  method.

  Note that if the obj itself is null, this method will simply return
  undefined.

  @param {Object} obj
    The object to retrieve from.

  @param {String} keyName
    The property key to retrieve

  @returns {Object} the property value or null.
*/
Ember.get = get;

/**
  @function

  Sets the value of a property on an object, respecting computed properties
  and notifying observers and other listeners of the change.  If the
  property is not defined but the object implements the unknownProperty()
  method then that will be invoked as well.

  If you plan to run on IE8 and older browsers then you should use this
  method anytime you want to set a property on an object that you don't
  know for sure is private.  (My convention only properties beginning with
  an underscore '_' are considered private.)

  On all newer browsers, you only need to use this method to set
  properties if the property might not be defined on the object and you want
  to respect the unknownProperty() handler.  Otherwise you can ignore this
  method.

  @param {Object} obj
    The object to modify.

  @param {String} keyName
    The property key to set

  @param {Object} value
    The value to set

  @returns {Object} the passed value.
*/
Ember.set = set;

// ..........................................................
// PATHS
//

/** @private */
function cleanupStars(path) {
  if (path.indexOf('*') === -1 || path === '*') return path;

  Ember.deprecate('Star paths are now treated the same as normal paths', !/(^|[^\.])\*/.test(path));

  return path.replace(/(^|.)\*/, function(match, char){
    return (char === '.') ? match : (char + '.');
  });
}

/** @private */
function normalizePath(path) {
  Ember.assert('must pass non-empty string to normalizePath()', path && path!=='');
  path = cleanupStars(path);

  if (path==='*') return path; //special case...
  var first = path.charAt(0);
  if(first==='.') return 'this'+path;
  return path;
}

// assumes normalized input; no *, normalized path, always a target...
/** @private */
function getPath(target, path) {
  var len = path.length, idx, next, key;

  path = cleanupStars(path);

  idx = 0;
  while(target && idx<len) {
    next = path.indexOf('.', idx);
    if (next<0) next = len;
    key = path.slice(idx, next);
    target = key==='*' ? target : get(target, key);

    if (target && target.isDestroyed) { return undefined; }

    idx = next+1;
  }
  return target ;
}

var TUPLE_RET = [];
var IS_GLOBAL = /^([A-Z$]|([0-9][A-Z$]))/;
var IS_GLOBAL_PATH = /^([A-Z$]|([0-9][A-Z$])).*[\.\*]/;
var HAS_THIS  = /^this[\.\*]/;
var FIRST_KEY = /^([^\.\*]+)/;

/** @private */
function firstKey(path) {
  return path.match(FIRST_KEY)[0];
}

// assumes path is already normalized
/** @private */
function normalizeTuple(target, path) {
  var hasThis  = HAS_THIS.test(path),
      isGlobal = !hasThis && IS_GLOBAL_PATH.test(path),
      key;

  if (!target || isGlobal) target = window;
  if (hasThis) path = path.slice(5);

  path = cleanupStars(path);

  if (target === window) {
    key = firstKey(path);
    target = get(target, key);
    path   = path.slice(key.length+1);
  }

  // must return some kind of path to be valid else other things will break.
  if (!path || path.length===0) throw new Error('Invalid Path');

  TUPLE_RET[0] = target;
  TUPLE_RET[1] = path;
  return TUPLE_RET;
}

/**
  @private

  Normalizes a path to support older-style property paths beginning with . or

  @function
  @param {String} path path to normalize
  @returns {String} normalized path
*/
Ember.normalizePath = normalizePath;

/**
  @private

  Normalizes a target/path pair to reflect that actual target/path that should
  be observed, etc.  This takes into account passing in global property
  paths (i.e. a path beginning with a captial letter not defined on the
  target) and * separators.

  @param {Object} target
    The current target.  May be null.

  @param {String} path
    A path on the target or a global property path.

  @returns {Array} a temporary array with the normalized target/path pair.
*/
Ember.normalizeTuple = function(target, path) {
  return normalizeTuple(target, normalizePath(path));
};

Ember.normalizeTuple.primitive = normalizeTuple;

Ember.getWithDefault = function(root, key, defaultValue) {
  var value = Ember.get(root, key);

  if (value === undefined) { return defaultValue; }
  return value;
};

Ember.getPath = function(root, path) {
  var hasThis, isGlobal, ret;

  // Helpers that operate with 'this' within an #each
  if (path === '') {
    return root;
  }

  if (!path && 'string'===typeof root) {
    path = root;
    root = null;
  }

  path = cleanupStars(path);

  // If there is no root and path is a key name, return that
  // property from the global object.
  // E.g. getPath('Ember') -> Ember
  if (root === null && path.indexOf('.') < 0) { return get(window, path); }

  // detect complicated paths and normalize them
  path = normalizePath(path);
  hasThis  = HAS_THIS.test(path);

  if (!root || hasThis) {
    var tuple = normalizeTuple(root, path);
    root = tuple[0];
    path = tuple[1];
    tuple.length = 0;
  }

  return getPath(root, path);
};

Ember.setPath = function(root, path, value, tolerant) {
  var keyName;

  if (arguments.length===2 && 'string' === typeof root) {
    value = path;
    path = root;
    root = null;
  }

  path = normalizePath(path);

  if (path.indexOf('.') > 0) {
    keyName = path.slice(path.lastIndexOf('.')+1);
    path    = path.slice(0, path.length-(keyName.length+1));
    if (path !== 'this') {
      root = Ember.getPath(root, path);
    }

  } else {
    if (IS_GLOBAL.test(path)) throw new Error('Invalid Path');
    keyName = path;
  }

  if (!keyName || keyName.length===0 || keyName==='*') {
    throw new Error('Invalid Path');
  }

  if (!root) {
    if (tolerant) { return; }
    else { throw new Error('Object in path '+path+' could not be found or was destroyed.'); }
  }

  return Ember.set(root, keyName, value);
};

/**
  Error-tolerant form of Ember.setPath. Will not blow up if any part of the
  chain is undefined, null, or destroyed.

  This is primarily used when syncing bindings, which may try to update after
  an object has been destroyed.
*/
Ember.trySetPath = function(root, path, value) {
  if (arguments.length===2 && 'string' === typeof root) {
    value = path;
    path = root;
    root = null;
  }

  return Ember.setPath(root, path, value, true);
};

/**
  Returns true if the provided path is global (e.g., "MyApp.fooController.bar")
  instead of local ("foo.bar.baz").

  @param {String} path
  @returns Boolean
*/
Ember.isGlobalPath = function(path) {
  return !HAS_THIS.test(path) && IS_GLOBAL.test(path);
};

})();



(function() {
// ==========================================================================
// Project:  Ember Metal
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var USE_ACCESSORS = Ember.USE_ACCESSORS;
var GUID_KEY = Ember.GUID_KEY;
var META_KEY = Ember.META_KEY;
var meta = Ember.meta;
var o_create = Ember.platform.create;
var o_defineProperty = Ember.platform.defineProperty;
var SIMPLE_PROPERTY, WATCHED_PROPERTY;

// ..........................................................
// DESCRIPTOR
//

var SIMPLE_DESC = {
  writable: true,
  configurable: true,
  enumerable: true,
  value: null
};

/**
  @private
  @constructor

  Objects of this type can implement an interface to responds requests to
  get and set.  The default implementation handles simple properties.

  You generally won't need to create or subclass this directly.
*/
var Dc = Ember.Descriptor = function() {};

var setup = Dc.setup = function(obj, keyName, value) {
  SIMPLE_DESC.value = value;
  o_defineProperty(obj, keyName, SIMPLE_DESC);
  SIMPLE_DESC.value = null;
};

var Dp = Ember.Descriptor.prototype;

/**
  Called whenever we want to set the property value.  Should set the value
  and return the actual set value (which is usually the same but may be
  different in the case of computed properties.)

  @param {Object} obj
    The object to set the value on.

  @param {String} keyName
    The key to set.

  @param {Object} value
    The new value

  @returns {Object} value actual set value
*/
Dp.set = function(obj, keyName, value) {
  obj[keyName] = value;
  return value;
};

/**
  Called whenever we want to get the property value.  Should retrieve the
  current value.

  @param {Object} obj
    The object to get the value on.

  @param {String} keyName
    The key to retrieve

  @returns {Object} the current value
*/
Dp.get = function(obj, keyName) {
  return w_get(obj, keyName, obj);
};

/**
  This is called on the descriptor to set it up on the object.  The
  descriptor is responsible for actually defining the property on the object
  here.

  The passed `value` is the transferValue returned from any previous
  descriptor.

  @param {Object} obj
    The object to set the value on.

  @param {String} keyName
    The key to set.

  @param {Object} value
    The transfer value from any previous descriptor.

  @returns {void}
*/
Dp.setup = setup;

/**
  This is called on the descriptor just before another descriptor takes its
  place.  This method should at least return the 'transfer value' of the
  property - which is the value you want to passed as the input to the new
  descriptor's setup() method.

  It is not generally necessary to actually 'undefine' the property as a new
  property descriptor will redefine it immediately after this method returns.

  @param {Object} obj
    The object to set the value on.

  @param {String} keyName
    The key to set.

  @returns {Object} transfer value
*/
Dp.teardown = function(obj, keyName) {
  return obj[keyName];
};

Dp.val = function(obj, keyName) {
  return obj[keyName];
};

// ..........................................................
// SIMPLE AND WATCHED PROPERTIES
//

// if accessors are disabled for the app then this will act as a guard when
// testing on browsers that do support accessors.  It will throw an exception
// if you do foo.bar instead of Ember.get(foo, 'bar')

// The exception to this is that any objects managed by Ember but not a descendant
// of Ember.Object will not throw an exception, instead failing silently. This
// prevent errors with other libraries that may attempt to access special
// properties on standard objects like Array. Usually this happens when copying
// an object by looping over all properties.

if (!USE_ACCESSORS) {
  Ember.Descriptor.MUST_USE_GETTER = function() {
    if (this instanceof Ember.Object) {
      Ember.assert('Must use Ember.get() to access this property', false);
    }
  };

  Ember.Descriptor.MUST_USE_SETTER = function() {
    if (this instanceof Ember.Object) {
      if (this.isDestroyed) {
        Ember.assert('You cannot set observed properties on destroyed objects', false);
      } else {
        Ember.assert('Must use Ember.set() to access this property', false);
      }
    }
  };
}

var WATCHED_DESC = {
  configurable: true,
  enumerable:   true,
  set: Ember.Descriptor.MUST_USE_SETTER
};

/** @private */
function w_get(obj, keyName, values) {
  values = values || meta(obj, false).values;

  if (values) {
    var ret = values[keyName];
    if (ret !== undefined) { return ret; }
    if (obj.unknownProperty) { return obj.unknownProperty(keyName); }
  }

}

/** @private */
function w_set(obj, keyName, value) {
  var m = meta(obj), watching;

  watching = m.watching[keyName]>0 && value!==m.values[keyName];
  if (watching) Ember.propertyWillChange(obj, keyName);
  m.values[keyName] = value;
  if (watching) Ember.propertyDidChange(obj, keyName);
  return value;
}

var WATCHED_GETTERS = {};
/** @private */
function mkWatchedGetter(keyName) {
  var ret = WATCHED_GETTERS[keyName];
  if (!ret) {
    ret = WATCHED_GETTERS[keyName] = function() {
      return w_get(this, keyName);
    };
  }
  return ret;
}

var WATCHED_SETTERS = {};
/** @private */
function mkWatchedSetter(keyName) {
  var ret = WATCHED_SETTERS[keyName];
  if (!ret) {
    ret = WATCHED_SETTERS[keyName] = function(value) {
      return w_set(this, keyName, value);
    };
  }
  return ret;
}

/**
  @private

  Private version of simple property that invokes property change callbacks.
*/
WATCHED_PROPERTY = new Ember.Descriptor();

if (Ember.platform.hasPropertyAccessors) {
  WATCHED_PROPERTY.get = w_get ;
  WATCHED_PROPERTY.set = w_set ;

  if (USE_ACCESSORS) {
    WATCHED_PROPERTY.setup = function(obj, keyName, value) {
      WATCHED_DESC.get = mkWatchedGetter(keyName);
      WATCHED_DESC.set = mkWatchedSetter(keyName);
      o_defineProperty(obj, keyName, WATCHED_DESC);
      WATCHED_DESC.get = WATCHED_DESC.set = null;
      if (value !== undefined) meta(obj).values[keyName] = value;
    };

  } else {
    WATCHED_PROPERTY.setup = function(obj, keyName, value) {
      WATCHED_DESC.get = mkWatchedGetter(keyName);
      o_defineProperty(obj, keyName, WATCHED_DESC);
      WATCHED_DESC.get = null;
      if (value !== undefined) meta(obj).values[keyName] = value;
    };
  }

  WATCHED_PROPERTY.teardown = function(obj, keyName) {
    var ret = meta(obj).values[keyName];
    delete meta(obj).values[keyName];
    return ret;
  };

// NOTE: if platform does not have property accessors then we just have to
// set values and hope for the best.  You just won't get any warnings...
} else {

  WATCHED_PROPERTY.set = function(obj, keyName, value) {
    var m = meta(obj), watching;

    watching = m.watching[keyName]>0 && value!==obj[keyName];
    if (watching) Ember.propertyWillChange(obj, keyName);
    obj[keyName] = value;
    if (watching) Ember.propertyDidChange(obj, keyName);
    return value;
  };

}

/**
  The default descriptor for simple properties.  Pass as the third argument
  to Ember.defineProperty() along with a value to set a simple value.

  @static
  @default Ember.Descriptor
*/
Ember.SIMPLE_PROPERTY = new Ember.Descriptor();
SIMPLE_PROPERTY = Ember.SIMPLE_PROPERTY;

SIMPLE_PROPERTY.unwatched = WATCHED_PROPERTY.unwatched = SIMPLE_PROPERTY;
SIMPLE_PROPERTY.watched   = WATCHED_PROPERTY.watched   = WATCHED_PROPERTY;


// ..........................................................
// DEFINING PROPERTIES API
//

/** @private */
function hasDesc(descs, keyName) {
  if (keyName === 'toString') return 'function' !== typeof descs.toString;
  else return !!descs[keyName];
}

/**
  @private

  NOTE: This is a low-level method used by other parts of the API.  You almost
  never want to call this method directly.  Instead you should use Ember.mixin()
  to define new properties.

  Defines a property on an object.  This method works much like the ES5
  Object.defineProperty() method except that it can also accept computed
  properties and other special descriptors.

  Normally this method takes only three parameters.  However if you pass an
  instance of Ember.Descriptor as the third param then you can pass an optional
  value as the fourth parameter.  This is often more efficient than creating
  new descriptor hashes for each property.

  ## Examples

      // ES5 compatible mode
      Ember.defineProperty(contact, 'firstName', {
        writable: true,
        configurable: false,
        enumerable: true,
        value: 'Charles'
      });

      // define a simple property
      Ember.defineProperty(contact, 'lastName', Ember.SIMPLE_PROPERTY, 'Jolley');

      // define a computed property
      Ember.defineProperty(contact, 'fullName', Ember.computed(function() {
        return this.firstName+' '+this.lastName;
      }).property('firstName', 'lastName').cacheable());
*/
Ember.defineProperty = function(obj, keyName, desc, val) {
  var m = meta(obj, false), descs = m.descs, watching = m.watching[keyName]>0, override = true;

  if (val === undefined) {
    override = false;
    val = hasDesc(descs, keyName) ? descs[keyName].teardown(obj, keyName) : obj[keyName];
  } else if (hasDesc(descs, keyName)) {
    descs[keyName].teardown(obj, keyName);
  }

  if (!desc) desc = SIMPLE_PROPERTY;

  if (desc instanceof Ember.Descriptor) {
    m = meta(obj, true);
    descs = m.descs;

    desc = (watching ? desc.watched : desc.unwatched) || desc;
    descs[keyName] = desc;
    desc.setup(obj, keyName, val, watching);

  // compatibility with ES5
  } else {
    if (descs[keyName]) meta(obj).descs[keyName] = null;
    o_defineProperty(obj, keyName, desc);
  }

  // if key is being watched, override chains that
  // were initialized with the prototype
  if (override && watching) Ember.overrideChains(obj, keyName, m);

  return this;
};

/**
  Creates a new object using the passed object as its prototype.  On browsers
  that support it, this uses the built in Object.create method.  Else one is
  simulated for you.

  This method is a better choice than Object.create() because it will make
  sure that any observers, event listeners, and computed properties are
  inherited from the parent as well.

  @param {Object} obj
    The object you want to have as the prototype.

  @returns {Object} the newly created object
*/
Ember.create = function(obj, props) {
  var ret = o_create(obj, props);
  if (GUID_KEY in ret) Ember.generateGuid(ret, 'ember');
  if (META_KEY in ret) Ember.rewatch(ret); // setup watch chains if needed.
  return ret;
};

/**
  @private

  Creates a new object using the passed object as its prototype.  This method
  acts like `Ember.create()` in every way except that bindings, observers, and
  computed properties will be activated on the object.

  The purpose of this method is to build an object for use in a prototype
  chain. (i.e. to be set as the `prototype` property on a constructor
  function).  Prototype objects need to inherit bindings, observers and
  other configuration so they pass it on to their children.  However since
  they are never 'live' objects themselves, they should not fire or make
  other changes when various properties around them change.

  You should use this method anytime you want to create a new object for use
  in a prototype chain.

  @param {Object} obj
    The base object.

  @param {Object} hash
    Optional hash of properties to define on the object.

  @returns {Object} new object
*/
Ember.createPrototype = function(obj, props) {
  var ret = o_create(obj, props);
  meta(ret, true).proto = ret;
  if (GUID_KEY in ret) Ember.generateGuid(ret, 'ember');
  if (META_KEY in ret) Ember.rewatch(ret); // setup watch chains if needed.
  return ret;
};

})();



(function() {
// ==========================================================================
// Project:  Ember Metal
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
Ember.warn("Computed properties will soon be cacheable by default. To enable this in your app, set `ENV.CP_DEFAULT_CACHEABLE = true`.", Ember.CP_DEFAULT_CACHEABLE);


var meta = Ember.meta;
var guidFor = Ember.guidFor;
var USE_ACCESSORS = Ember.USE_ACCESSORS;
var a_slice = Array.prototype.slice;
var o_create = Ember.platform.create;
var o_defineProperty = Ember.platform.defineProperty;

// ..........................................................
// DEPENDENT KEYS
//

// data structure:
//  meta.deps = {
//   'depKey': {
//     'keyName': count,
//     __emberproto__: SRC_OBJ [to detect clones]
//     },
//   __emberproto__: SRC_OBJ
//  }

/** @private */
function uniqDeps(obj, depKey) {
  var m = meta(obj), deps, ret;
  deps = m.deps;
  if (!deps) {
    deps = m.deps = { __emberproto__: obj };
  } else if (deps.__emberproto__ !== obj) {
    deps = m.deps = o_create(deps);
    deps.__emberproto__ = obj;
  }

  ret = deps[depKey];
  if (!ret) {
    ret = deps[depKey] = { __emberproto__: obj };
  } else if (ret.__emberproto__ !== obj) {
    ret = deps[depKey] = o_create(ret);
    ret.__emberproto__ = obj;
  }

  return ret;
}

/** @private */
function addDependentKey(obj, keyName, depKey) {
  var deps = uniqDeps(obj, depKey);
  deps[keyName] = (deps[keyName] || 0) + 1;
  Ember.watch(obj, depKey);
}

/** @private */
function removeDependentKey(obj, keyName, depKey) {
  var deps = uniqDeps(obj, depKey);
  deps[keyName] = (deps[keyName] || 0) - 1;
  Ember.unwatch(obj, depKey);
}

/** @private */
function addDependentKeys(desc, obj, keyName) {
  var keys = desc._dependentKeys,
      len  = keys ? keys.length : 0;
  for(var idx=0;idx<len;idx++) addDependentKey(obj, keyName, keys[idx]);
}

// ..........................................................
// COMPUTED PROPERTY
//

/** @private */
function ComputedProperty(func, opts) {
  this.func = func;
  this._cacheable = (opts && opts.cacheable !== undefined) ? opts.cacheable : Ember.CP_DEFAULT_CACHEABLE;
  this._dependentKeys = opts && opts.dependentKeys;
}

/**
  @constructor
*/
Ember.ComputedProperty = ComputedProperty;
ComputedProperty.prototype = new Ember.Descriptor();

var CP_DESC = {
  configurable: true,
  enumerable:   true,
  get: function() { return undefined; }, // for when use_accessors is false.
  set: Ember.Descriptor.MUST_USE_SETTER  // for when use_accessors is false
};

/** @private */
function mkCpGetter(keyName, desc) {
  var cacheable = desc._cacheable,
      func     = desc.func;

  if (cacheable) {
    return function() {
      var ret, cache = meta(this).cache;
      if (keyName in cache) return cache[keyName];
      ret = cache[keyName] = func.call(this, keyName);
      return ret ;
    };
  } else {
    return function() {
      return func.call(this, keyName);
    };
  }
}

/** @private */
function mkCpSetter(keyName, desc) {
  var cacheable = desc._cacheable,
      func      = desc.func;

  return function(value) {
    var m = meta(this, cacheable),
        watched = (m.source===this) && m.watching[keyName]>0,
        ret, oldSuspended, lastSetValues;

    oldSuspended = desc._suspended;
    desc._suspended = this;

    watched = watched && m.lastSetValues[keyName]!==guidFor(value);
    if (watched) {
      m.lastSetValues[keyName] = guidFor(value);
      Ember.propertyWillChange(this, keyName);
    }

    if (cacheable) delete m.cache[keyName];
    ret = func.call(this, keyName, value);
    if (cacheable) m.cache[keyName] = ret;
    if (watched) Ember.propertyDidChange(this, keyName);
    desc._suspended = oldSuspended;
    return ret;
  };
}

/**
  @extends Ember.ComputedProperty
  @private
*/
var Cp = ComputedProperty.prototype;

/**
  Call on a computed property to set it into cacheable mode.  When in this
  mode the computed property will automatically cache the return value of
  your function until one of the dependent keys changes.

      MyApp.president = Ember.Object.create({
        fullName: function() {
          return this.get('firstName') + ' ' + this.get('lastName');

          // After calculating the value of this function, Ember.js will
          // return that value without re-executing this function until
          // one of the dependent properties change.
        }.property('firstName', 'lastName').cacheable()
      });

  Properties are cacheable by default.

  @name Ember.ComputedProperty.cacheable
  @param {Boolean} aFlag optional set to false to disable caching
  @returns {Ember.ComputedProperty} receiver
*/
Cp.cacheable = function(aFlag) {
  this._cacheable = aFlag!==false;
  return this;
};

/**
  Call on a computed property to set it into non-cached mode.  When in this
  mode the computed property will not automatically cache the return value.

      MyApp.outsideService = Ember.Object.create({
        value: function() {
          return OutsideService.getValue();
        }.property().volatile()
      });

  @name Ember.ComputedProperty.volatile
  @returns {Ember.ComputedProperty} receiver
*/
Cp.volatile = function() {
  return this.cacheable(false);
};

/**
  Sets the dependent keys on this computed property.  Pass any number of
  arguments containing key paths that this computed property depends on.

      MyApp.president = Ember.Object.create({
        fullName: Ember.computed(function() {
          return this.get('firstName') + ' ' + this.get('lastName');

          // Tell Ember.js that this computed property depends on firstName
          // and lastName
        }).property('firstName', 'lastName')
      });

  @name Ember.ComputedProperty.property
  @param {String} path... zero or more property paths
  @returns {Ember.ComputedProperty} receiver
*/
Cp.property = function() {
  this._dependentKeys = a_slice.call(arguments);
  return this;
};

/**
  In some cases, you may want to annotate computed properties with additional
  metadata about how they function or what values they operate on. For example,
  computed property functions may close over variables that are then no longer
  available for introspection.

  You can pass a hash of these values to a computed property like this:

      person: function() {
        var personId = this.get('personId');
        return App.Person.create({ id: personId });
      }.property().meta({ type: App.Person })

  The hash that you pass to the `meta()` function will be saved on the
  computed property descriptor under the `_meta` key. Ember runtime
  exposes a public API for retrieving these values from classes,
  via the `metaForProperty()` function.

  @name Ember.ComputedProperty.meta
  @param {Hash} metadata
  @returns {Ember.ComputedProperty} property descriptor instance
*/

Cp.meta = function(meta) {
  this._meta = meta;
  return this;
};

/** @private - impl descriptor API */
Cp.setup = function(obj, keyName, value) {
  CP_DESC.get = mkCpGetter(keyName, this);
  CP_DESC.set = mkCpSetter(keyName, this);
  o_defineProperty(obj, keyName, CP_DESC);
  CP_DESC.get = CP_DESC.set = null;
  addDependentKeys(this, obj, keyName);
};

/** @private - impl descriptor API */
Cp.teardown = function(obj, keyName) {
  var keys = this._dependentKeys,
      len  = keys ? keys.length : 0;
  for(var idx=0;idx<len;idx++) removeDependentKey(obj, keyName, keys[idx]);

  if (this._cacheable) delete meta(obj).cache[keyName];

  return null; // no value to restore
};

/** @private - impl descriptor API */
Cp.didChange = function(obj, keyName) {
  if (this._cacheable && (this._suspended !== obj)) {
    delete meta(obj).cache[keyName];
  }
};

/** @private - impl descriptor API */
Cp.get = function(obj, keyName) {
  var ret, cache;

  if (this._cacheable) {
    cache = meta(obj).cache;
    if (keyName in cache) return cache[keyName];
    ret = cache[keyName] = this.func.call(obj, keyName);
  } else {
    ret = this.func.call(obj, keyName);
  }
  return ret ;
};

/** @private - impl descriptor API */
Cp.set = function(obj, keyName, value) {
  var cacheable = this._cacheable;

  var m = meta(obj, cacheable),
      watched = (m.source===obj) && m.watching[keyName]>0,
      ret, oldSuspended, lastSetValues;

  oldSuspended = this._suspended;
  this._suspended = obj;

  watched = watched && m.lastSetValues[keyName]!==guidFor(value);
  if (watched) {
    m.lastSetValues[keyName] = guidFor(value);
    Ember.propertyWillChange(obj, keyName);
  }

  if (cacheable) delete m.cache[keyName];
  ret = this.func.call(obj, keyName, value);
  if (cacheable) m.cache[keyName] = ret;
  if (watched) Ember.propertyDidChange(obj, keyName);
  this._suspended = oldSuspended;
  return ret;
};

Cp.val = function(obj, keyName) {
  return meta(obj, false).values[keyName];
};

if (!Ember.platform.hasPropertyAccessors) {
  Cp.setup = function(obj, keyName, value) {
    obj[keyName] = undefined; // so it shows up in key iteration
    addDependentKeys(this, obj, keyName);
  };

} else if (!USE_ACCESSORS) {
  Cp.setup = function(obj, keyName) {
    // throw exception if not using Ember.get() and Ember.set() when supported
    o_defineProperty(obj, keyName, CP_DESC);
    addDependentKeys(this, obj, keyName);
  };
}

/**
  This helper returns a new property descriptor that wraps the passed
  computed property function.  You can use this helper to define properties
  with mixins or via Ember.defineProperty().

  The function you pass will be used to both get and set property values.
  The function should accept two parameters, key and value.  If value is not
  undefined you should set the value first.  In either case return the
  current value of the property.

  @param {Function} func
    The computed property function.

  @returns {Ember.ComputedProperty} property descriptor instance
*/
Ember.computed = function(func) {
  var args;

  if (arguments.length > 1) {
    args = a_slice.call(arguments, 0, -1);
    func = a_slice.call(arguments, -1)[0];
  }

  var cp = new ComputedProperty(func);

  if (args) {
    cp.property.apply(cp, args);
  }

  return cp;
};

/**
  Returns the cached value for a property, if one exists.
  This can be useful for peeking at the value of a computed
  property that is generated lazily, without accidentally causing
  it to be created.

  @param {Object} obj the object whose property you want to check
  @param {String} key the name of the property whose cached value you want
                      to return

*/
Ember.cacheFor = function(obj, key) {
  var cache = meta(obj, false).cache;

  if (cache && key in cache) {
    return cache[key];
  }
};

})();



(function() {
/*jshint newcap:false*/

// NOTE: There is a bug in jshint that doesn't recognize `Object()` without `new`
// as being ok unless both `newcap:false` and not `use strict`.
// https://github.com/jshint/jshint/issues/392

// Testing this is not ideal, but we want ArrayUtils to use native functions
// if available, but not to use versions created by libraries like Prototype
/** @private */
var isNativeFunc = function(func) {
  // This should probably work in all browsers likely to have ES5 array methods
  return func && Function.prototype.toString.call(func).indexOf('[native code]') > -1;
};

// From: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/array/map
/** @private */
var arrayMap = isNativeFunc(Array.prototype.map) ? Array.prototype.map : function(fun /*, thisp */) {
  //"use strict";

  if (this === void 0 || this === null) {
    throw new TypeError();
  }

  var t = Object(this);
  var len = t.length >>> 0;
  if (typeof fun !== "function") {
    throw new TypeError();
  }

  var res = new Array(len);
  var thisp = arguments[1];
  for (var i = 0; i < len; i++) {
    if (i in t) {
      res[i] = fun.call(thisp, t[i], i, t);
    }
  }

  return res;
};

// From: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/array/foreach
/** @private */
var arrayForEach = isNativeFunc(Array.prototype.forEach) ? Array.prototype.forEach : function(fun /*, thisp */) {
  //"use strict";

  if (this === void 0 || this === null) {
    throw new TypeError();
  }

  var t = Object(this);
  var len = t.length >>> 0;
  if (typeof fun !== "function") {
    throw new TypeError();
  }

  var thisp = arguments[1];
  for (var i = 0; i < len; i++) {
    if (i in t) {
      fun.call(thisp, t[i], i, t);
    }
  }
};

/** @private */
var arrayIndexOf = isNativeFunc(Array.prototype.indexOf) ? Array.prototype.indexOf : function (obj, fromIndex) {
  if (fromIndex === null || fromIndex === undefined) { fromIndex = 0; }
  else if (fromIndex < 0) { fromIndex = Math.max(0, this.length + fromIndex); }
  for (var i = fromIndex, j = this.length; i < j; i++) {
    if (this[i] === obj) { return i; }
  }
  return -1;
};


Ember.ArrayUtils = {
  map: function(obj) {
    var args = Array.prototype.slice.call(arguments, 1);
    return obj.map ? obj.map.apply(obj, args) : arrayMap.apply(obj, args);
  },

  forEach: function(obj) {
    var args = Array.prototype.slice.call(arguments, 1);
    return obj.forEach ? obj.forEach.apply(obj, args) : arrayForEach.apply(obj, args);
  },

  indexOf: function(obj) {
    var args = Array.prototype.slice.call(arguments, 1);
    return obj.indexOf ? obj.indexOf.apply(obj, args) : arrayIndexOf.apply(obj, args);
  },

  indexesOf: function(obj) {
    var args = Array.prototype.slice.call(arguments, 1);
    return args[0] === undefined ? [] : Ember.ArrayUtils.map(args[0], function(item) {
      return Ember.ArrayUtils.indexOf(obj, item);
    });
  },

  removeObject: function(array, item) {
    var index = this.indexOf(array, item);
    if (index !== -1) { array.splice(index, 1); }
  }
};


if (Ember.SHIM_ES5) {
  if (!Array.prototype.map) {
    /** @private */
    Array.prototype.map = arrayMap;
  }

  if (!Array.prototype.forEach) {
    /** @private */
    Array.prototype.forEach = arrayForEach;
  }

  if (!Array.prototype.indexOf) {
    /** @private */
    Array.prototype.indexOf = arrayIndexOf;
  }
}

})();



(function() {
// ==========================================================================
// Project:  Ember Metal
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var AFTER_OBSERVERS = ':change';
var BEFORE_OBSERVERS = ':before';
var guidFor = Ember.guidFor;
var normalizePath = Ember.normalizePath;

var deferred = 0;
var array_Slice = Array.prototype.slice;
var array_ForEach = Ember.ArrayUtils.forEach;

/** @private */
var ObserverSet = function () {
  this.targetSet = {};
};
ObserverSet.prototype.add = function (target, path) {
  var targetSet = this.targetSet,
    targetGuid = Ember.guidFor(target),
    pathSet = targetSet[targetGuid];
  if (!pathSet) {
    targetSet[targetGuid] = pathSet = {};
  }
  if (pathSet[path]) {
    return false;
  } else {
    return pathSet[path] = true;
  }
};
ObserverSet.prototype.clear = function () {
  this.targetSet = {};
};

/** @private */
var DeferredEventQueue = function() {
  this.targetSet = {};
  this.queue = [];
};

DeferredEventQueue.prototype.push = function(target, eventName) {
  var targetSet = this.targetSet,
    queue = this.queue,
    targetGuid = Ember.guidFor(target),
    eventNameSet = targetSet[targetGuid],
    index;

  if (!eventNameSet) {
    targetSet[targetGuid] = eventNameSet = {};
  }
  index = eventNameSet[eventName];
  if (index === undefined) {
    eventNameSet[eventName] = queue.push(Ember.deferEvent(target, eventName)) - 1;
  } else {
    queue[index] = Ember.deferEvent(target, eventName);
  }
};

DeferredEventQueue.prototype.flush = function() {
  var queue = this.queue;
  this.queue = [];
  this.targetSet = {};
  for (var i=0, len=queue.length; i < len; ++i) {
    queue[i]();
  }
};

var queue = new DeferredEventQueue(), beforeObserverSet = new ObserverSet();

/** @private */
function notifyObservers(obj, eventName, forceNotification) {
  if (deferred && !forceNotification) {
    queue.push(obj, eventName);
  } else {
    Ember.sendEvent(obj, eventName);
  }
}

/** @private */
function flushObserverQueue() {
  beforeObserverSet.clear();

  queue.flush();
}

Ember.beginPropertyChanges = function() {
  deferred++;
  return this;
};

Ember.endPropertyChanges = function() {
  deferred--;
  if (deferred<=0) flushObserverQueue();
};

/**
  Make a series of property changes together in an
  exception-safe way.

      Ember.changeProperties(function() {
        obj1.set('foo', mayBlowUpWhenSet);
        obj2.set('bar', baz);
      });
*/
Ember.changeProperties = function(cb, binding){
  Ember.beginPropertyChanges();
  try {
    cb.call(binding);
  } finally {
    Ember.endPropertyChanges();
  }
};

/**
  Set a list of properties on an object. These properties are set inside
  a single `beginPropertyChanges` and `endPropertyChanges` batch, so
  observers will be buffered.
*/
Ember.setProperties = function(self, hash) {
  Ember.changeProperties(function(){
    for(var prop in hash) {
      if (hash.hasOwnProperty(prop)) Ember.set(self, prop, hash[prop]);
    }
  });
  return self;
};


/** @private */
function changeEvent(keyName) {
  return keyName+AFTER_OBSERVERS;
}

/** @private */
function beforeEvent(keyName) {
  return keyName+BEFORE_OBSERVERS;
}

/** @private */
function changeKey(eventName) {
  return eventName.slice(0, -7);
}

/** @private */
function beforeKey(eventName) {
  return eventName.slice(0, -7);
}

/** @private */
function xformForArgs(args) {
  return function (target, method, params) {
    var obj = params[0], keyName = changeKey(params[1]), val;
    var copy_args = args.slice();
    if (method.length>2) {
      val = Ember.getPath(Ember.isGlobalPath(keyName) ? window : obj, keyName);
    }
    copy_args.unshift(obj, keyName, val);
    method.apply(target, copy_args);
  };
}

var xformChange = xformForArgs([]);

/** @private */
function xformBefore(target, method, params) {
  var obj = params[0], keyName = beforeKey(params[1]), val;
  if (method.length>2) val = Ember.getPath(obj, keyName);
  method.call(target, obj, keyName, val);
}

Ember.addObserver = function(obj, path, target, method) {
  path = normalizePath(path);

  var xform;
  if (arguments.length > 4) {
    var args = array_Slice.call(arguments, 4);
    xform = xformForArgs(args);
  } else {
    xform = xformChange;
  }
  Ember.addListener(obj, changeEvent(path), target, method, xform);
  Ember.watch(obj, path);
  return this;
};

/** @private */
Ember.observersFor = function(obj, path) {
  return Ember.listenersFor(obj, changeEvent(path));
};

Ember.removeObserver = function(obj, path, target, method) {
  path = normalizePath(path);
  Ember.unwatch(obj, path);
  Ember.removeListener(obj, changeEvent(path), target, method);
  return this;
};

Ember.addBeforeObserver = function(obj, path, target, method) {
  path = normalizePath(path);
  Ember.addListener(obj, beforeEvent(path), target, method, xformBefore);
  Ember.watch(obj, path);
  return this;
};

// Suspend observer during callback.
//
// This should only be used by the target of the observer
// while it is setting the observed path.
/** @private */
Ember._suspendObserver = function(obj, path, target, method, callback) {
  return Ember._suspendListener(obj, changeEvent(path), target, method, callback);
};

/** @private */
Ember.beforeObserversFor = function(obj, path) {
  return Ember.listenersFor(obj, beforeEvent(path));
};

Ember.removeBeforeObserver = function(obj, path, target, method) {
  path = normalizePath(path);
  Ember.unwatch(obj, path);
  Ember.removeListener(obj, beforeEvent(path), target, method);
  return this;
};

/** @private */
Ember.notifyObservers = function(obj, keyName) {
  if (obj.isDestroying) { return; }

  notifyObservers(obj, changeEvent(keyName));
};

/** @private */
Ember.notifyBeforeObservers = function(obj, keyName) {
  if (obj.isDestroying) { return; }

  var guid, set, forceNotification = false;

  if (deferred) {
    if (beforeObserverSet.add(obj, keyName)) {
      forceNotification = true;
    } else {
      return;
    }
  }

  notifyObservers(obj, beforeEvent(keyName), forceNotification);
};


})();



(function() {
// ==========================================================================
// Project:  Ember Metal
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var guidFor = Ember.guidFor;
var meta    = Ember.meta;
var get = Ember.get, set = Ember.set;
var normalizeTuple = Ember.normalizeTuple.primitive;
var normalizePath  = Ember.normalizePath;
var SIMPLE_PROPERTY = Ember.SIMPLE_PROPERTY;
var GUID_KEY = Ember.GUID_KEY;
var META_KEY = Ember.META_KEY;
var notifyObservers = Ember.notifyObservers;
var forEach = Ember.ArrayUtils.forEach;

var FIRST_KEY = /^([^\.\*]+)/;
var IS_PATH = /[\.\*]/;

/** @private */
function firstKey(path) {
  return path.match(FIRST_KEY)[0];
}

// returns true if the passed path is just a keyName
/** @private */
function isKeyName(path) {
  return path==='*' || !IS_PATH.test(path);
}

// ..........................................................
// DEPENDENT KEYS
//

var DEP_SKIP = { __emberproto__: true }; // skip some keys and toString

/** @private */
function iterDeps(method, obj, depKey, seen, meta) {

  var guid = guidFor(obj);
  if (!seen[guid]) seen[guid] = {};
  if (seen[guid][depKey]) return ;
  seen[guid][depKey] = true;

  var deps = meta.deps;
  deps = deps && deps[depKey];
  if (deps) {
    for(var key in deps) {
      if (DEP_SKIP[key]) continue;
      method(obj, key);
    }
  }
}


var WILL_SEEN, DID_SEEN;

// called whenever a property is about to change to clear the cache of any dependent keys (and notify those properties of changes, etc...)
/** @private */
function dependentKeysWillChange(obj, depKey, meta) {
  if (obj.isDestroying) { return; }

  var seen = WILL_SEEN, top = !seen;
  if (top) seen = WILL_SEEN = {};
  iterDeps(propertyWillChange, obj, depKey, seen, meta);
  if (top) WILL_SEEN = null;
}

// called whenever a property has just changed to update dependent keys
/** @private */
function dependentKeysDidChange(obj, depKey, meta) {
  if (obj.isDestroying) { return; }

  var seen = DID_SEEN, top = !seen;
  if (top) seen = DID_SEEN = {};
  iterDeps(propertyDidChange, obj, depKey, seen, meta);
  if (top) DID_SEEN = null;
}

// ..........................................................
// CHAIN
//

/** @private */
function addChainWatcher(obj, keyName, node) {
  if (!obj || ('object' !== typeof obj)) return; // nothing to do
  var m = meta(obj);
  var nodes = m.chainWatchers;
  if (!nodes || nodes.__emberproto__ !== obj) {
    nodes = m.chainWatchers = { __emberproto__: obj };
  }

  if (!nodes[keyName]) nodes[keyName] = {};
  nodes[keyName][guidFor(node)] = node;
  Ember.watch(obj, keyName);
}

/** @private */
function removeChainWatcher(obj, keyName, node) {
  if (!obj || ('object' !== typeof obj)) return; // nothing to do
  var m = meta(obj, false);
  var nodes = m.chainWatchers;
  if (!nodes || nodes.__emberproto__ !== obj) return; //nothing to do
  if (nodes[keyName]) delete nodes[keyName][guidFor(node)];
  Ember.unwatch(obj, keyName);
}

var pendingQueue = [];

// attempts to add the pendingQueue chains again.  If some of them end up
// back in the queue and reschedule is true, schedules a timeout to try
// again.
/** @private */
function flushPendingChains() {
  if (pendingQueue.length===0) return ; // nothing to do

  var queue = pendingQueue;
  pendingQueue = [];

  forEach(queue, function(q) { q[0].add(q[1]); });

  Ember.warn('Watching an undefined global, Ember expects watched globals to be setup by the time the run loop is flushed, check for typos', pendingQueue.length > 0);
}

/** @private */
function isProto(pvalue) {
  return meta(pvalue, false).proto === pvalue;
}

// A ChainNode watches a single key on an object.  If you provide a starting
// value for the key then the node won't actually watch it.  For a root node
// pass null for parent and key and object for value.
/** @private */
var ChainNode = function(parent, key, value, separator) {
  var obj;
  this._parent = parent;
  this._key    = key;

  // _watching is true when calling get(this._parent, this._key) will
  // return the value of this node.
  //
  // It is false for the root of a chain (because we have no parent)
  // and for global paths (because the parent node is the object with
  // the observer on it)
  this._watching = value===undefined;

  this._value  = value;
  this._separator = separator || '.';
  this._paths = {};
  if (this._watching) {
    this._object = parent.value();
    if (this._object) addChainWatcher(this._object, this._key, this);
  }

  // Special-case: the EachProxy relies on immediate evaluation to
  // establish its observers.
  //
  // TODO: Replace this with an efficient callback that the EachProxy
  // can implement.
  if (this._parent && this._parent._key === '@each') {
    this.value();
  }
};


var Wp = ChainNode.prototype;

Wp.value = function() {
  if (this._value === undefined && this._watching){
    var obj = this._parent.value();
    this._value = (obj && !isProto(obj)) ? get(obj, this._key) : undefined;
  }
  return this._value;
};

Wp.destroy = function() {
  if (this._watching) {
    var obj = this._object;
    if (obj) removeChainWatcher(obj, this._key, this);
    this._watching = false; // so future calls do nothing
  }
};

// copies a top level object only
Wp.copy = function(obj) {
  var ret = new ChainNode(null, null, obj, this._separator);
  var paths = this._paths, path;
  for(path in paths) {
    if (paths[path] <= 0) continue; // this check will also catch non-number vals.
    ret.add(path);
  }
  return ret;
};

// called on the root node of a chain to setup watchers on the specified
// path.
Wp.add = function(path) {
  var obj, tuple, key, src, separator, paths;

  paths = this._paths;
  paths[path] = (paths[path] || 0) + 1 ;

  obj = this.value();
  tuple = normalizeTuple(obj, path);

  // the path was a local path
  if (tuple[0] && (tuple[0] === obj)) {
    path = tuple[1];
    key  = firstKey(path);
    path = path.slice(key.length+1);

  // global path, but object does not exist yet.
  // put into a queue and try to connect later.
  } else if (!tuple[0]) {
    pendingQueue.push([this, path]);
    tuple.length = 0;
    return;

  // global path, and object already exists
  } else {
    src  = tuple[0];
    key  = path.slice(0, 0-(tuple[1].length+1));
    separator = path.slice(key.length, key.length+1);
    path = tuple[1];
  }

  tuple.length = 0;
  this.chain(key, path, src, separator);
};

// called on the root node of a chain to teardown watcher on the specified
// path
Wp.remove = function(path) {
  var obj, tuple, key, src, paths;

  paths = this._paths;
  if (paths[path] > 0) paths[path]--;

  obj = this.value();
  tuple = normalizeTuple(obj, path);
  if (tuple[0] === obj) {
    path = tuple[1];
    key  = firstKey(path);
    path = path.slice(key.length+1);

  } else {
    src  = tuple[0];
    key  = path.slice(0, 0-(tuple[1].length+1));
    path = tuple[1];
  }

  tuple.length = 0;
  this.unchain(key, path);
};

Wp.count = 0;

Wp.chain = function(key, path, src, separator) {
  var chains = this._chains, node;
  if (!chains) chains = this._chains = {};

  node = chains[key];
  if (!node) node = chains[key] = new ChainNode(this, key, src, separator);
  node.count++; // count chains...

  // chain rest of path if there is one
  if (path && path.length>0) {
    key = firstKey(path);
    path = path.slice(key.length+1);
    node.chain(key, path); // NOTE: no src means it will observe changes...
  }
};

Wp.unchain = function(key, path) {
  var chains = this._chains, node = chains[key];

  // unchain rest of path first...
  if (path && path.length>1) {
    key  = firstKey(path);
    path = path.slice(key.length+1);
    node.unchain(key, path);
  }

  // delete node if needed.
  node.count--;
  if (node.count<=0) {
    delete chains[node._key];
    node.destroy();
  }

};

Wp.willChange = function() {
  var chains = this._chains;
  if (chains) {
    for(var key in chains) {
      if (!chains.hasOwnProperty(key)) continue;
      chains[key].willChange();
    }
  }

  if (this._parent) this._parent.chainWillChange(this, this._key, 1);
};

Wp.chainWillChange = function(chain, path, depth) {
  if (this._key) path = this._key+this._separator+path;

  if (this._parent) {
    this._parent.chainWillChange(this, path, depth+1);
  } else {
    if (depth>1) Ember.propertyWillChange(this.value(), path);
    path = 'this.'+path;
    if (this._paths[path]>0) Ember.propertyWillChange(this.value(), path);
  }
};

Wp.chainDidChange = function(chain, path, depth) {
  if (this._key) path = this._key+this._separator+path;
  if (this._parent) {
    this._parent.chainDidChange(this, path, depth+1);
  } else {
    if (depth>1) Ember.propertyDidChange(this.value(), path);
    path = 'this.'+path;
    if (this._paths[path]>0) Ember.propertyDidChange(this.value(), path);
  }
};

Wp.didChange = function(suppressEvent) {
  // invalidate my own value first.
  if (this._watching) {
    var obj = this._parent.value();
    if (obj !== this._object) {
      removeChainWatcher(this._object, this._key, this);
      this._object = obj;
      addChainWatcher(obj, this._key, this);
    }
    this._value  = undefined;

    // Special-case: the EachProxy relies on immediate evaluation to
    // establish its observers.
    if (this._parent && this._parent._key === '@each')
      this.value();
  }

  // then notify chains...
  var chains = this._chains;
  if (chains) {
    for(var key in chains) {
      if (!chains.hasOwnProperty(key)) continue;
      chains[key].didChange(suppressEvent);
    }
  }

  if (suppressEvent) return;

  // and finally tell parent about my path changing...
  if (this._parent) this._parent.chainDidChange(this, this._key, 1);
};

// get the chains for the current object.  If the current object has
// chains inherited from the proto they will be cloned and reconfigured for
// the current object.
/** @private */
function chainsFor(obj) {
  var m   = meta(obj), ret = m.chains;
  if (!ret) {
    ret = m.chains = new ChainNode(null, null, obj);
  } else if (ret.value() !== obj) {
    ret = m.chains = ret.copy(obj);
  }
  return ret ;
}


/** @private */
function notifyChains(obj, m, keyName, methodName, arg) {
  var nodes = m.chainWatchers;

  if (!nodes || nodes.__emberproto__ !== obj) return; // nothing to do

  nodes = nodes[keyName];
  if (!nodes) return;

  for(var key in nodes) {
    if (!nodes.hasOwnProperty(key)) continue;
    nodes[key][methodName](arg);
  }
}

Ember.overrideChains = function(obj, keyName, m) {
  notifyChains(obj, m, keyName, 'didChange', true);
};

/** @private */
function chainsWillChange(obj, keyName, m) {
  notifyChains(obj, m, keyName, 'willChange');
}

/** @private */
function chainsDidChange(obj, keyName, m) {
  notifyChains(obj, m, keyName, 'didChange');
}

// ..........................................................
// WATCH
//

var WATCHED_PROPERTY = Ember.SIMPLE_PROPERTY.watched;

/**
  @private

  Starts watching a property on an object.  Whenever the property changes,
  invokes Ember.propertyWillChange and Ember.propertyDidChange.  This is the
  primitive used by observers and dependent keys; usually you will never call
  this method directly but instead use higher level methods like
  Ember.addObserver().
*/
Ember.watch = function(obj, keyName) {

  // can't watch length on Array - it is special...
  if (keyName === 'length' && Ember.typeOf(obj)==='array') return this;

  var m = meta(obj), watching = m.watching, desc;
  keyName = normalizePath(keyName);

  // activate watching first time
  if (!watching[keyName]) {
    watching[keyName] = 1;
    if (isKeyName(keyName)) {
      desc = m.descs[keyName];
      desc = desc ? desc.watched : WATCHED_PROPERTY;
      if (desc) Ember.defineProperty(obj, keyName, desc);
    } else {
      chainsFor(obj).add(keyName);
    }

  }  else {
    watching[keyName] = (watching[keyName]||0)+1;
  }
  return this;
};

Ember.isWatching = function(obj, keyName) {
  return !!meta(obj).watching[keyName];
};

Ember.watch.flushPending = flushPendingChains;

/** @private */
Ember.unwatch = function(obj, keyName) {
  // can't watch length on Array - it is special...
  if (keyName === 'length' && Ember.typeOf(obj)==='array') return this;

  var watching = meta(obj).watching, desc, descs;
  keyName = normalizePath(keyName);
  if (watching[keyName] === 1) {
    watching[keyName] = 0;
    if (isKeyName(keyName)) {
      desc = meta(obj).descs[keyName];
      desc = desc ? desc.unwatched : SIMPLE_PROPERTY;
      if (desc) Ember.defineProperty(obj, keyName, desc);
    } else {
      chainsFor(obj).remove(keyName);
    }

  } else if (watching[keyName]>1) {
    watching[keyName]--;
  }

  return this;
};

/**
  @private

  Call on an object when you first beget it from another object.  This will
  setup any chained watchers on the object instance as needed.  This method is
  safe to call multiple times.
*/
Ember.rewatch = function(obj) {
  var m = meta(obj, false), chains = m.chains, bindings = m.bindings, key, b;

  // make sure the object has its own guid.
  if (GUID_KEY in obj && !obj.hasOwnProperty(GUID_KEY)) {
    Ember.generateGuid(obj, 'ember');
  }

  // make sure any chained watchers update.
  if (chains && chains.value() !== obj) chainsFor(obj);

  return this;
};

// ..........................................................
// PROPERTY CHANGES
//

/**
  This function is called just before an object property is about to change.
  It will notify any before observers and prepare caches among other things.

  Normally you will not need to call this method directly but if for some
  reason you can't directly watch a property you can invoke this method
  manually along with `Ember.propertyDidChange()` which you should call just
  after the property value changes.

  @memberOf Ember

  @param {Object} obj
    The object with the property that will change

  @param {String} keyName
    The property key (or path) that will change.

  @returns {void}
*/
function propertyWillChange(obj, keyName) {
  var m = meta(obj, false), proto = m.proto, desc = m.descs[keyName];
  if (proto === obj) return ;
  if (desc && desc.willChange) desc.willChange(obj, keyName);
  dependentKeysWillChange(obj, keyName, m);
  chainsWillChange(obj, keyName, m);
  Ember.notifyBeforeObservers(obj, keyName);
}

Ember.propertyWillChange = propertyWillChange;

/**
  This function is called just after an object property has changed.
  It will notify any observers and clear caches among other things.

  Normally you will not need to call this method directly but if for some
  reason you can't directly watch a property you can invoke this method
  manually along with `Ember.propertyWilLChange()` which you should call just
  before the property value changes.

  @memberOf Ember

  @param {Object} obj
    The object with the property that will change

  @param {String} keyName
    The property key (or path) that will change.

  @returns {void}
*/
function propertyDidChange(obj, keyName) {
  var m = meta(obj, false), proto = m.proto, desc = m.descs[keyName];
  if (proto === obj) return ;
  if (desc && desc.didChange) desc.didChange(obj, keyName);
  dependentKeysDidChange(obj, keyName, m);
  chainsDidChange(obj, keyName, m);
  Ember.notifyObservers(obj, keyName);
}

Ember.propertyDidChange = propertyDidChange;

var NODE_STACK = [];

/**
  Tears down the meta on an object so that it can be garbage collected.
  Multiple calls will have no effect.

  @param {Object} obj  the object to destroy
  @returns {void}
*/
Ember.destroy = function (obj) {
  var meta = obj[META_KEY], node, nodes, key, nodeObject;
  if (meta) {
    obj[META_KEY] = null;
    // remove chainWatchers to remove circular references that would prevent GC
    node = meta.chains;
    if (node) {
      NODE_STACK.push(node);
      // process tree
      while (NODE_STACK.length > 0) {
        node = NODE_STACK.pop();
        // push children
        nodes = node._chains;
        if (nodes) {
          for (key in nodes) {
            if (nodes.hasOwnProperty(key)) {
              NODE_STACK.push(nodes[key]);
            }
          }
        }
        // remove chainWatcher in node object
        if (node._watching) {
          nodeObject = node._object;
          if (nodeObject) {
            removeChainWatcher(nodeObject, node._key, node);
          }
        }
      }
    }
  }
};

})();



(function() {
// ==========================================================================
// Project:  Ember Metal
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var o_create = Ember.platform.create;
var meta = Ember.meta;
var guidFor = Ember.guidFor;
var a_slice = Array.prototype.slice;

/**
  The event system uses a series of nested hashes to store listeners on an
  object. When a listener is registered, or when an event arrives, these
  hashes are consulted to determine which target and action pair to invoke.

  The hashes are stored in the object's meta hash, and look like this:

      // Object's meta hash
      {
        listeners: {               // variable name: `listenerSet`
          "foo:changed": {         // variable name: `targetSet`
            [targetGuid]: {        // variable name: `actionSet`
              [methodGuid]: {      // variable name: `action`
                target: [Object object],
                method: [Function function],
                xform: [Function function]
              }
            }
          }
        }
      }

*/

/** @private */
var metaPath = Ember.metaPath;

// Gets the set of all actions, keyed on the guid of each action's
// method property.
/** @private */
function actionSetFor(obj, eventName, target, writable) {
  var targetGuid = guidFor(target);
  return metaPath(obj, ['listeners', eventName, targetGuid], writable);
}

// Gets the set of all targets, keyed on the guid of each action's
// target property.
/** @private */
function targetSetFor(obj, eventName) {
  var listenerSet = meta(obj, false).listeners;
  if (!listenerSet) { return false; }

  return listenerSet[eventName] || false;
}

// TODO: This knowledge should really be a part of the
// meta system.
var SKIP_PROPERTIES = { __ember_source__: true };

/** @private */
function iterateSet(targetSet, callback, params) {
  if (!targetSet) { return false; }
  // Iterate through all elements of the target set
  for(var targetGuid in targetSet) {
    if (SKIP_PROPERTIES[targetGuid]) { continue; }

    var actionSet = targetSet[targetGuid];
    if (actionSet) {
      // Iterate through the elements of the action set
      for(var methodGuid in actionSet) {
        if (SKIP_PROPERTIES[methodGuid]) { continue; }

        var action = actionSet[methodGuid];
        if (action) {
          if (callback(action, params) === true) {
            return true;
          }
        }
      }
    }
  }
  return false;
}

/** @private */
function invokeAction(action, params) {
  var method = action.method, target = action.target, xform = action.xform;
  // If there is no target, the target is the object
  // on which the event was fired.
  if (!target) { target = params[0]; }
  if ('string' === typeof method) { method = target[method]; }

  // Listeners can provide an `xform` function, which can perform
  // arbitrary transformations, such as changing the order of
  // parameters.
  //
  // This is primarily used by ember-runtime's observer system, which
  // provides a higher level abstraction on top of events, including
  // dynamically looking up current values and passing them into the
  // registered listener.
  if (xform) {
    xform(target, method, params);
  } else {
    method.apply(target, params);
  }
}

/**
  The parameters passed to an event listener are not exactly the
  parameters passed to an observer. if you pass an xform function, it will
  be invoked and is able to translate event listener parameters into the form
  that observers are expecting.

  @memberOf Ember
*/
function addListener(obj, eventName, target, method, xform) {
  Ember.assert("You must pass at least an object and event name to Ember.addListener", !!obj && !!eventName);

  if (!method && 'function' === typeof target) {
    method = target;
    target = null;
  }

  var actionSet = actionSetFor(obj, eventName, target, true),
      methodGuid = guidFor(method);

  if (!actionSet[methodGuid]) {
    actionSet[methodGuid] = { target: target, method: method, xform: xform };
  } else {
    actionSet[methodGuid].xform = xform; // used by observers etc to map params
  }

  if ('function' === typeof obj.didAddListener) {
    obj.didAddListener(eventName, target, method);
  }
}

/** @memberOf Ember */
function removeListener(obj, eventName, target, method) {
  if (!method && 'function'===typeof target) {
    method = target;
    target = null;
  }

  var actionSet = actionSetFor(obj, eventName, target, true),
      methodGuid = guidFor(method);

  // we can't simply delete this parameter, because if we do, we might
  // re-expose the property from the prototype chain.
  if (actionSet && actionSet[methodGuid]) { actionSet[methodGuid] = null; }

  if (obj && 'function'===typeof obj.didRemoveListener) {
    obj.didRemoveListener(eventName, target, method);
  }
}

// Suspend listener during callback.
//
// This should only be used by the target of the event listener
// when it is taking an action that would cause the event, e.g.
// an object might suspend its property change listener while it is
// setting that property.
/** @private */
function suspendListener(obj, eventName, target, method, callback) {
  if (!method && 'function' === typeof target) {
    method = target;
    target = null;
  }

  var actionSet = actionSetFor(obj, eventName, target, true),
      methodGuid = guidFor(method),
      action = actionSet && actionSet[methodGuid];

  actionSet[methodGuid] = null;
  try {
    return callback.call(target);
  } finally {
    actionSet[methodGuid] = action;
  }
}

// returns a list of currently watched events
/** @memberOf Ember */
function watchedEvents(obj) {
  var listeners = meta(obj, false).listeners, ret = [];

  if (listeners) {
    for(var eventName in listeners) {
      if (!SKIP_PROPERTIES[eventName] && listeners[eventName]) {
        ret.push(eventName);
      }
    }
  }
  return ret;
}

/** @memberOf Ember */
function sendEvent(obj, eventName) {

  // first give object a chance to handle it
  if (obj !== Ember && 'function' === typeof obj.sendEvent) {
    obj.sendEvent.apply(obj, a_slice.call(arguments, 1));
  }

  var targetSet = targetSetFor(obj, eventName);
  iterateSet(targetSet, invokeAction, arguments);

  return true;
}

/** @memberOf Ember */
function deferEvent(obj, eventName) {
  var targetSet = targetSetFor(obj, eventName), actions = [], params = arguments;
  iterateSet(targetSet, function (action) {
    actions.push(action);
  });

  return function() {
    if (obj !== Ember && 'function' === typeof obj.sendEvent) {
      obj.sendEvent.apply(obj, a_slice.call(params, 1));
    }

    for (var i=0, len=actions.length; i < len; ++i) {
      invokeAction(actions[i], params);
    }
  };
}

/** @memberOf Ember */
function hasListeners(obj, eventName) {
  var targetSet = targetSetFor(obj, eventName);
  if (iterateSet(targetSet, function () {return true;})) {
    return true;
  }

  // no listeners!  might as well clean this up so it is faster later.
  var set = metaPath(obj, ['listeners'], true);
  set[eventName] = null;

  return false;
}

/** @memberOf Ember */
function listenersFor(obj, eventName) {
  var targetSet = targetSetFor(obj, eventName), ret = [];
  iterateSet(targetSet, function (action) {
    ret.push([action.target, action.method]);
  });
  return ret;
}

Ember.addListener = addListener;
Ember.removeListener = removeListener;
Ember._suspendListener = suspendListener;
Ember.sendEvent = sendEvent;
Ember.hasListeners = hasListeners;
Ember.watchedEvents = watchedEvents;
Ember.listenersFor = listenersFor;
Ember.deferEvent = deferEvent;
})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2006-2011 Strobe Inc. and contributors.
//            Portions ©2008-2010 Apple Inc. All rights reserved.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
// Ember.Logger
// Ember.watch.flushPending
// Ember.beginPropertyChanges, Ember.endPropertyChanges
// Ember.guidFor
// Ember.ArrayUtils

// ..........................................................
// HELPERS
//

var slice = Array.prototype.slice;
var forEach = Ember.ArrayUtils.forEach;

// invokes passed params - normalizing so you can pass target/func,
// target/string or just func
/** @private */
function invoke(target, method, args, ignore) {

  if (method===undefined) {
    method = target;
    target = undefined;
  }

  if ('string'===typeof method) method = target[method];
  if (args && ignore>0) {
    args = args.length>ignore ? slice.call(args, ignore) : null;
  }

  // Unfortunately in some browsers we lose the backtrace if we rethrow the existing error,
  // so in the event that we don't have an `onerror` handler we don't wrap in a try/catch
  if ('function' === typeof Ember.onerror) {
    try {
      // IE8's Function.prototype.apply doesn't accept undefined/null arguments.
      return method.apply(target || this, args || []);
    } catch (error) {
      Ember.onerror(error);
    }
  } else {
    // IE8's Function.prototype.apply doesn't accept undefined/null arguments.
    return method.apply(target || this, args || []);
  }
}


// ..........................................................
// RUNLOOP
//

var timerMark; // used by timers...

/** @private */
var K = function() {};

/** @private */
var RunLoop = function(prev) {
  var self;

  if (this instanceof RunLoop) {
    self = this;
  } else {
    self = new K();
  }

  self._prev = prev || null;
  self.onceTimers = {};

  return self;
};

K.prototype = RunLoop.prototype;

RunLoop.prototype = {
  end: function() {
    this.flush();
  },

  prev: function() {
    return this._prev;
  },

  // ..........................................................
  // Delayed Actions
  //

  schedule: function(queueName, target, method) {
    var queues = this._queues, queue;
    if (!queues) queues = this._queues = {};
    queue = queues[queueName];
    if (!queue) queue = queues[queueName] = [];

    var args = arguments.length>3 ? slice.call(arguments, 3) : null;
    queue.push({ target: target, method: method, args: args });
    return this;
  },

  flush: function(queueName) {
    var queues = this._queues, queueNames, idx, len, queue, log;

    if (!queues) return this; // nothing to do

    function iter(item) {
      invoke(item.target, item.method, item.args);
    }

    Ember.watch.flushPending(); // make sure all chained watchers are setup

    if (queueName) {
      while (this._queues && (queue = this._queues[queueName])) {
        this._queues[queueName] = null;

        // the sync phase is to allow property changes to propagate.  don't
        // invoke observers until that is finished.
        if (queueName === 'sync') {
          log = Ember.LOG_BINDINGS;
          if (log) Ember.Logger.log('Begin: Flush Sync Queue');

          Ember.beginPropertyChanges();
          try {
            forEach(queue, iter);
          } finally {
            Ember.endPropertyChanges();
          }

          if (log) Ember.Logger.log('End: Flush Sync Queue');

        } else {
          forEach(queue, iter);
        }
      }

    } else {
      queueNames = Ember.run.queues;
      len = queueNames.length;
      do {
        this._queues = null;
        for(idx=0;idx<len;idx++) {
          queueName = queueNames[idx];
          queue = queues[queueName];

          if (queue) {
            // the sync phase is to allow property changes to propagate.  don't
            // invoke observers until that is finished.
            if (queueName === 'sync') {
              log = Ember.LOG_BINDINGS;
              if (log) Ember.Logger.log('Begin: Flush Sync Queue');

              Ember.beginPropertyChanges();
              try {
                forEach(queue, iter);
              } finally {
                Ember.endPropertyChanges();
              }

              if (log) Ember.Logger.log('End: Flush Sync Queue');
            } else {
              forEach(queue, iter);
            }
          }
        }
      } while (queues = this._queues); // go until queues stay clean
    }

    timerMark = null;

    return this;
  }

};

Ember.RunLoop = RunLoop;

// ..........................................................
// Ember.run - this is ideally the only public API the dev sees
//
/** 
* @namespace Ember.run is both a function and a namespace for
* RunLoop-related functions.
* @name Ember.run
*/ 

/**
  Runs the passed target and method inside of a RunLoop, ensuring any
  deferred actions including bindings and views updates are flushed at the
  end.

  Normally you should not need to invoke this method yourself.  However if
  you are implementing raw event handlers when interfacing with other
  libraries or plugins, you should probably wrap all of your code inside this
  call.

      Ember.run(function(){
        // code to be execute within a RunLoop 
      });

  @name run^2
  @methodOf Ember.run
  @param {Object} target
    (Optional) target of method to call

  @param {Function|String} method
    Method to invoke.  May be a function or a string.  If you pass a string
    then it will be looked up on the passed target.

  @param {Object...} args
    Any additional arguments you wish to pass to the method.

  @returns {Object} return value from invoking the passed function.
*/
Ember.run = function(target, method) {

  var ret, loop;
  run.begin();
  try {
    if (target || method) ret = invoke(target, method, arguments, 2);
  } finally {
    run.end();
  }
  return ret;
};

/** @private */
var run = Ember.run;


/**
  Begins a new RunLoop.  Any deferred actions invoked after the begin will
  be buffered until you invoke a matching call to Ember.run.end().  This is
  an lower-level way to use a RunLoop instead of using Ember.run().

      Ember.run.begin();
      // code to be execute within a RunLoop 
      Ember.run.end();


  @returns {void}
*/
Ember.run.begin = function() {
  run.currentRunLoop = new RunLoop(run.currentRunLoop);
};

/**
  Ends a RunLoop.  This must be called sometime after you call Ember.run.begin()
  to flush any deferred actions.  This is a lower-level way to use a RunLoop
  instead of using Ember.run().

      Ember.run.begin();
      // code to be execute within a RunLoop 
      Ember.run.end();

  @returns {void}
*/
Ember.run.end = function() {
  Ember.assert('must have a current run loop', run.currentRunLoop);
  try {
    run.currentRunLoop.end();
  }
  finally {
    run.currentRunLoop = run.currentRunLoop.prev();
  }
};

/**
  Array of named queues.  This array determines the order in which queues
  are flushed at the end of the RunLoop.  You can define your own queues by
  simply adding the queue name to this array.  Normally you should not need
  to inspect or modify this property.

  @property {String}
  @default ['sync', 'actions', 'destroy', 'timers']
*/
Ember.run.queues = ['sync', 'actions', 'destroy', 'timers'];

/**
  Adds the passed target/method and any optional arguments to the named
  queue to be executed at the end of the RunLoop.  If you have not already
  started a RunLoop when calling this method one will be started for you
  automatically.

  At the end of a RunLoop, any methods scheduled in this way will be invoked.
  Methods will be invoked in an order matching the named queues defined in
  the run.queues property.

      Ember.run.schedule('timers', this, function(){
        // this will be executed at the end of the RunLoop, when timers are run
        console.log("scheduled on timers queue");
      });
      Ember.run.schedule('sync', this, function(){
        // this will be executed at the end of the RunLoop, when bindings are synced
        console.log("scheduled on sync queue");
      });
      // Note the functions will be run in order based on the run queues order. Output would be:
      //   scheduled on sync queue
      //   scheduled on timers queue

  @param {String} queue
    The name of the queue to schedule against.  Default queues are 'sync' and
    'actions'

  @param {Object} target
    (Optional) target object to use as the context when invoking a method.

  @param {String|Function} method
    The method to invoke.  If you pass a string it will be resolved on the
    target object at the time the scheduled item is invoked allowing you to
    change the target function.

  @param {Object} arguments...
    Optional arguments to be passed to the queued method.

  @returns {void}
*/
Ember.run.schedule = function(queue, target, method) {
  var loop = run.autorun();
  loop.schedule.apply(loop, arguments);
};

var autorunTimer;

/** @private */
function autorun() {
  autorunTimer = null;
  if (run.currentRunLoop) run.end();
}

/**
  Begins a new RunLoop if necessary and schedules a timer to flush the
  RunLoop at a later time.  This method is used by parts of Ember to
  ensure the RunLoop always finishes.  You normally do not need to call this
  method directly.  Instead use Ember.run().

      Ember.run.autorun();

  @returns {Ember.RunLoop} the new current RunLoop
*/
Ember.run.autorun = function() {

  if (!run.currentRunLoop) {
    run.begin();

    // TODO: throw during tests
    if (Ember.testing) {
      run.end();
    } else if (!autorunTimer) {
      autorunTimer = setTimeout(autorun, 1);
    }
  }

  return run.currentRunLoop;
};

/**
  Immediately flushes any events scheduled in the 'sync' queue.  Bindings
  use this queue so this method is a useful way to immediately force all
  bindings in the application to sync.

  You should call this method anytime you need any changed state to propagate
  throughout the app immediately without repainting the UI.

      Ember.run.sync();

  @returns {void}
*/
Ember.run.sync = function() {
  run.autorun();
  run.currentRunLoop.flush('sync');
};

// ..........................................................
// TIMERS
//

var timers = {}; // active timers...

var laterScheduled = false;
/** @private */
function invokeLaterTimers() {
  var now = (+ new Date()), earliest = -1;
  for(var key in timers) {
    if (!timers.hasOwnProperty(key)) continue;
    var timer = timers[key];
    if (timer && timer.expires) {
      if (now >= timer.expires) {
        delete timers[key];
        invoke(timer.target, timer.method, timer.args, 2);
      } else {
        if (earliest<0 || (timer.expires < earliest)) earliest=timer.expires;
      }
    }
  }

  // schedule next timeout to fire...
  if (earliest>0) setTimeout(invokeLaterTimers, earliest-(+ new Date()));
}

/**
  Invokes the passed target/method and optional arguments after a specified
  period if time.  The last parameter of this method must always be a number
  of milliseconds.

  You should use this method whenever you need to run some action after a
  period of time instead of using setTimeout().  This method will ensure that
  items that expire during the same script execution cycle all execute
  together, which is often more efficient than using a real setTimeout.

      Ember.run.later(myContext, function(){
        // code here will execute within a RunLoop in about 500ms with this == myContext
      }, 500);

  @param {Object} target
    (optional) target of method to invoke

  @param {Function|String} method
    The method to invoke.  If you pass a string it will be resolved on the
    target at the time the method is invoked.

  @param {Object...} args
    Optional arguments to pass to the timeout.

  @param {Number} wait
    Number of milliseconds to wait.

  @returns {Timer} an object you can use to cancel a timer at a later time.
*/
Ember.run.later = function(target, method) {
  var args, expires, timer, guid, wait;

  // setTimeout compatibility...
  if (arguments.length===2 && 'function' === typeof target) {
    wait   = method;
    method = target;
    target = undefined;
    args   = [target, method];

  } else {
    args = slice.call(arguments);
    wait = args.pop();
  }

  expires = (+ new Date())+wait;
  timer   = { target: target, method: method, expires: expires, args: args };
  guid    = Ember.guidFor(timer);
  timers[guid] = timer;
  run.once(timers, invokeLaterTimers);
  return guid;
};

/** @private */
function invokeOnceTimer(guid, onceTimers) {
  if (onceTimers[this.tguid]) delete onceTimers[this.tguid][this.mguid];
  if (timers[guid]) invoke(this.target, this.method, this.args, 2);
  delete timers[guid];
}

/**
  Schedules an item to run one time during the current RunLoop.  Calling
  this method with the same target/method combination will have no effect.

  Note that although you can pass optional arguments these will not be
  considered when looking for duplicates.  New arguments will replace previous
  calls.

      Ember.run(function(){
        var doFoo = function() { foo(); }
        Ember.run.once(myContext, doFoo);
        Ember.run.once(myContext, doFoo);
        // doFoo will only be executed once at the end of the RunLoop
      });

  @param {Object} target
    (optional) target of method to invoke

  @param {Function|String} method
    The method to invoke.  If you pass a string it will be resolved on the
    target at the time the method is invoked.

  @param {Object...} args
    Optional arguments to pass to the timeout.


  @returns {Object} timer
*/
Ember.run.once = function(target, method) {
  var tguid = Ember.guidFor(target), mguid = Ember.guidFor(method), guid, timer;

  var onceTimers = run.autorun().onceTimers;
  guid = onceTimers[tguid] && onceTimers[tguid][mguid];
  if (guid && timers[guid]) {
    timers[guid].args = slice.call(arguments); // replace args

  } else {
    timer = {
      target: target,
      method: method,
      args:   slice.call(arguments),
      tguid:  tguid,
      mguid:  mguid
    };

    guid  = Ember.guidFor(timer);
    timers[guid] = timer;
    if (!onceTimers[tguid]) onceTimers[tguid] = {};
    onceTimers[tguid][mguid] = guid; // so it isn't scheduled more than once

    run.schedule('actions', timer, invokeOnceTimer, guid, onceTimers);
  }

  return guid;
};

var scheduledNext = false;
/** @private */
function invokeNextTimers() {
  scheduledNext = null;
  for(var key in timers) {
    if (!timers.hasOwnProperty(key)) continue;
    var timer = timers[key];
    if (timer.next) {
      delete timers[key];
      invoke(timer.target, timer.method, timer.args, 2);
    }
  }
}

/**
  Schedules an item to run after control has been returned to the system.
  This is often equivalent to calling setTimeout(function...,1).

      Ember.run.next(myContext, function(){
        // code to be executed in the next RunLoop, which will be scheduled after the current one
      });

  @param {Object} target
    (optional) target of method to invoke

  @param {Function|String} method
    The method to invoke.  If you pass a string it will be resolved on the
    target at the time the method is invoked.

  @param {Object...} args
    Optional arguments to pass to the timeout.

  @returns {Object} timer
*/
Ember.run.next = function(target, method) {
  var timer, guid;

  timer = {
    target: target,
    method: method,
    args: slice.call(arguments),
    next: true
  };

  guid = Ember.guidFor(timer);
  timers[guid] = timer;

  if (!scheduledNext) scheduledNext = setTimeout(invokeNextTimers, 1);
  return guid;
};

/**
  Cancels a scheduled item.  Must be a value returned by `Ember.run.later()`,
  `Ember.run.once()`, or `Ember.run.next()`.

      var runNext = Ember.run.next(myContext, function(){
        // will not be executed
      });
      Ember.run.cancel(runNext);

      var runLater = Ember.run.next(myContext, function(){
        // will not be executed
      }, 500);
      Ember.run.cancel(runLater);

      var runOnce = Ember.run.once(myContext, function(){
        // will not be executed
      });
      Ember.run.cancel(runOnce);

  @param {Object} timer
    Timer object to cancel

  @returns {void}
*/
Ember.run.cancel = function(timer) {
  delete timers[timer];
};

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
// Ember.Logger
// get, getPath, setPath, trySetPath
// guidFor, isArray, meta
// addObserver, removeObserver
// Ember.run.schedule

// ..........................................................
// CONSTANTS
//


/**
  @static

  Debug parameter you can turn on. This will log all bindings that fire to
  the console. This should be disabled in production code. Note that you
  can also enable this from the console or temporarily.

  @type Boolean
  @default false
*/
Ember.LOG_BINDINGS = false || !!Ember.ENV.LOG_BINDINGS;

/**
  @static

  Performance paramter. This will benchmark the time spent firing each
  binding.

  @type Boolean
*/
Ember.BENCHMARK_BINDING_NOTIFICATIONS = !!Ember.ENV.BENCHMARK_BINDING_NOTIFICATIONS;

/**
  @static

  Performance parameter. This will benchmark the time spend configuring each
  binding.

  @type Boolean
*/
Ember.BENCHMARK_BINDING_SETUP = !!Ember.ENV.BENCHMARK_BINDING_SETUP;


/**
  @static

  Default placeholder for multiple values in bindings.

  @type String
  @default '@@MULT@@'
*/
Ember.MULTIPLE_PLACEHOLDER = '@@MULT@@';

/**
  @static

  Default placeholder for empty values in bindings.  Used by notEmpty()
  helper unless you specify an alternative.

  @type String
  @default '@@EMPTY@@'
*/
Ember.EMPTY_PLACEHOLDER = '@@EMPTY@@';

// ..........................................................
// TYPE COERCION HELPERS
//

// Coerces a non-array value into an array.
/** @private */
function MULTIPLE(val) {
  if (val instanceof Array) return val;
  if (val === undefined || val === null) return [];
  return [val];
}

// Treats a single-element array as the element. Otherwise
// returns a placeholder.
/** @private */
function SINGLE(val, placeholder) {
  if (val instanceof Array) {
    if (val.length>1) return placeholder;
    else return val[0];
  }
  return val;
}

// Coerces the binding value into a Boolean.

var BOOL = {
  to: function (val) {
    return !!val;
  }
};

// Returns the Boolean inverse of the value.
var NOT = {
  to: function NOT(val) {
    return !val;
  }
};

var get     = Ember.get,
    getPath = Ember.getPath,
    setPath = Ember.setPath,
    guidFor = Ember.guidFor,
    isGlobalPath = Ember.isGlobalPath;

// Applies a binding's transformations against a value.
/** @private */
function getTransformedValue(binding, val, obj, dir) {

  // First run a type transform, if it exists, that changes the fundamental
  // type of the value. For example, some transforms convert an array to a
  // single object.

  var typeTransform = binding._typeTransform;
  if (typeTransform) { val = typeTransform(val, binding._placeholder); }

  // handle transforms
  var transforms = binding._transforms,
      len        = transforms ? transforms.length : 0,
      idx;

  for(idx=0;idx<len;idx++) {
    var transform = transforms[idx][dir];
    if (transform) { val = transform.call(this, val, obj); }
  }
  return val;
}

/** @private */
function empty(val) {
  return val===undefined || val===null || val==='' || (Ember.isArray(val) && get(val, 'length')===0) ;
}

/** @private */
function getPathWithGlobals(obj, path) {
  return getPath(isGlobalPath(path) ? window : obj, path);
}

/** @private */
function getTransformedFromValue(obj, binding) {
  var operation = binding._operation,
      fromValue;
  if (operation) {
    fromValue = operation(obj, binding._from, binding._operand);
  } else {
    fromValue = getPathWithGlobals(obj, binding._from);
  }
  return getTransformedValue(binding, fromValue, obj, 'to');
}

/** @private */
function getTransformedToValue(obj, binding) {
  var toValue = getPath(obj, binding._to);
  return getTransformedValue(binding, toValue, obj, 'from');
}

/** @private */
var AND_OPERATION = function(obj, left, right) {
  return getPathWithGlobals(obj, left) && getPathWithGlobals(obj, right);
};

/** @private */
var OR_OPERATION = function(obj, left, right) {
  return getPathWithGlobals(obj, left) || getPathWithGlobals(obj, right);
};

// ..........................................................
// BINDING
//
/** @private */
var K = function() {};

/** @private */
var Binding = function(toPath, fromPath) {
  var self;

  if (this instanceof Binding) {
    self = this;
  } else {
    self = new K();
  }

  /** @private */
  self._direction = 'fwd';

  /** @private */
  self._from = fromPath;
  self._to   = toPath;

  return self;
};

K.prototype = Binding.prototype;

Binding.prototype = /** @scope Ember.Binding.prototype */ {
  /**
    This copies the Binding so it can be connected to another object.
    @returns {Ember.Binding}
  */
  copy: function () {
    var copy = new Binding(this._to, this._from);
    if (this._oneWay) {
      copy._oneWay = true;
    }
    if (this._transforms) {
      copy._transforms = this._transforms.slice(0);
    }
    if (this._typeTransform) {
      copy._typeTransform = this._typeTransform;
      copy._placeholder = this._placeholder;
    }
    if (this._operand) {
      copy._operand = this._operand;
      copy._operation = this._operation;
    }
    return copy;
  },

  // ..........................................................
  // CONFIG
  //

  /**
    This will set "from" property path to the specified value. It will not
    attempt to resolve this property path to an actual object until you
    connect the binding.

    The binding will search for the property path starting at the root object
    you pass when you connect() the binding.  It follows the same rules as
    `getPath()` - see that method for more information.

    @param {String} propertyPath the property path to connect to
    @returns {Ember.Binding} receiver
  */
  from: function(path) {
    this._from = path;
    return this;
  },

  /**
    This will set the "to" property path to the specified value. It will not
    attempt to resolve this property path to an actual object until you
    connect the binding.

    The binding will search for the property path starting at the root object
    you pass when you connect() the binding.  It follows the same rules as
    `getPath()` - see that method for more information.

    @param {String|Tuple} propertyPath A property path or tuple
    @param {Object} [root] Root object to use when resolving the path.
    @returns {Ember.Binding} this
  */
  to: function(path) {
    this._to = path;
    return this;
  },

  /**
    Configures the binding as one way. A one-way binding will relay changes
    on the "from" side to the "to" side, but not the other way around. This
    means that if you change the "to" side directly, the "from" side may have
    a different value.

    @param {Boolean} flag
      (Optional) passing nothing here will make the binding oneWay.  You can
      instead pass false to disable oneWay, making the binding two way again.

    @returns {Ember.Binding} receiver
  */
  oneWay: function(flag) {
    this._oneWay = flag===undefined ? true : !!flag;
    return this;
  },

  /**
    Adds the specified transform to the array of transform functions.

    A transform is a hash with `to` and `from` properties. Each property
    should be a function that performs a transformation in either the
    forward or back direction.

    The functions you pass must have the following signature:

          function(value) {};

    They must also return the transformed value.

    Transforms are invoked in the order they were added. If you are
    extending a binding and want to reset the transforms, you can call
    `resetTransform()` first.

    @param {Function} transformFunc the transform function.
    @returns {Ember.Binding} this
  */
  transform: function(transform) {
    if ('function' === typeof transform) {
      transform = { to: transform };
    }

    if (!this._transforms) this._transforms = [];
    this._transforms.push(transform);
    return this;
  },

  /**
    Resets the transforms for the binding. After calling this method the
    binding will no longer transform values. You can then add new transforms
    as needed.

    @returns {Ember.Binding} this
  */
  resetTransforms: function() {
    this._transforms = null;
    return this;
  },

  /**
    Adds a transform to the chain that will allow only single values to pass.
    This will allow single values and nulls to pass through. If you pass an
    array, it will be mapped as so:

      - [] => null
      - [a] => a
      - [a,b,c] => Multiple Placeholder

    You can pass in an optional multiple placeholder or it will use the
    default.

    Note that this transform will only happen on forwarded valued. Reverse
    values are send unchanged.

    @param {String} fromPath from path or null
    @param {Object} [placeholder] Placeholder value.
    @returns {Ember.Binding} this
  */
  single: function(placeholder) {
    if (placeholder===undefined) placeholder = Ember.MULTIPLE_PLACEHOLDER;
    this._typeTransform = SINGLE;
    this._placeholder = placeholder;
    return this;
  },

  /**
    Adds a transform that will convert the passed value to an array. If
    the value is null or undefined, it will be converted to an empty array.

    @param {String} [fromPath]
    @returns {Ember.Binding} this
  */
  multiple: function() {
    this._typeTransform = MULTIPLE;
    this._placeholder = null;
    return this;
  },

  /**
    Adds a transform to convert the value to a bool value. If the value is
    an array it will return true if array is not empty. If the value is a
    string it will return true if the string is not empty.

    @returns {Ember.Binding} this
  */
  bool: function() {
    this.transform(BOOL);
    return this;
  },

  /**
    Adds a transform that will return the placeholder value if the value is
    null, undefined, an empty array or an empty string. See also notNull().

    @param {Object} [placeholder] Placeholder value.
    @returns {Ember.Binding} this
  */
  notEmpty: function(placeholder) {
    if (placeholder === null || placeholder === undefined) {
      placeholder = Ember.EMPTY_PLACEHOLDER;
    }

    this.transform({
      to: function(val) { return empty(val) ? placeholder : val; }
    });

    return this;
  },

  /**
    Adds a transform that will return the placeholder value if the value is
    null or undefined. Otherwise it will passthrough untouched. See also notEmpty().

    @param {String} fromPath from path or null
    @param {Object} [placeholder] Placeholder value.
    @returns {Ember.Binding} this
  */
  notNull: function(placeholder) {
    if (placeholder === null || placeholder === undefined) {
      placeholder = Ember.EMPTY_PLACEHOLDER;
    }

    this.transform({
      to: function(val) { return (val === null || val === undefined) ? placeholder : val; }
    });

    return this;
  },

  /**
    Adds a transform to convert the value to the inverse of a bool value. This
    uses the same transform as bool() but inverts it.

    @returns {Ember.Binding} this
  */
  not: function() {
    this.transform(NOT);
    return this;
  },

  /**
    Adds a transform that will return true if the value is null or undefined, false otherwise.

    @returns {Ember.Binding} this
  */
  isNull: function() {
    this.transform(function(val) { return val === null || val === undefined; });
    return this;
  },

  /** @private */
  toString: function() {
    var oneWay = this._oneWay ? '[oneWay]' : '';
    return "Ember.Binding<" + guidFor(this) + ">(" + this._from + " -> " + this._to + ")" + oneWay;
  },

  // ..........................................................
  // CONNECT AND SYNC
  //

  /**
    Attempts to connect this binding instance so that it can receive and relay
    changes. This method will raise an exception if you have not set the
    from/to properties yet.

    @param {Object} obj
      The root object for this binding.

    @param {Boolean} preferFromParam
      private: Normally, `connect` cannot take an object if `from` already set
      an object. Internally, we would like to be able to provide a default object
      to be used if no object was provided via `from`, so this parameter turns
      off the assertion.

    @returns {Ember.Binding} this
  */
  connect: function(obj) {
    Ember.assert('Must pass a valid object to Ember.Binding.connect()', !!obj);

    var oneWay = this._oneWay, operand = this._operand;

    // add an observer on the object to be notified when the binding should be updated
    Ember.addObserver(obj, this._from, this, this.fromDidChange);

    // if there is an operand, add an observer onto it as well
    if (operand) { Ember.addObserver(obj, operand, this, this.fromDidChange); }

    // if the binding is a two-way binding, also set up an observer on the target
    // object.
    if (!oneWay) { Ember.addObserver(obj, this._to, this, this.toDidChange); }

    if (Ember.meta(obj,false).proto !== obj) { this._scheduleSync(obj, 'fwd'); }

    this._readyToSync = true;
    return this;
  },

  /**
    Disconnects the binding instance. Changes will no longer be relayed. You
    will not usually need to call this method.

    @param {Object} obj
      The root object you passed when connecting the binding.

    @returns {Ember.Binding} this
  */
  disconnect: function(obj) {
    Ember.assert('Must pass a valid object to Ember.Binding.disconnect()', !!obj);

    var oneWay = this._oneWay, operand = this._operand;

    // remove an observer on the object so we're no longer notified of
    // changes that should update bindings.
    Ember.removeObserver(obj, this._from, this, this.fromDidChange);

    // if there is an operand, remove the observer from it as well
    if (operand) Ember.removeObserver(obj, operand, this, this.fromDidChange);

    // if the binding is two-way, remove the observer from the target as well
    if (!oneWay) Ember.removeObserver(obj, this._to, this, this.toDidChange);

    this._readyToSync = false; // disable scheduled syncs...
    return this;
  },

  // ..........................................................
  // PRIVATE
  //

  /** @private - called when the from side changes */
  fromDidChange: function(target) {
    this._scheduleSync(target, 'fwd');
  },

  /** @private - called when the to side changes */
  toDidChange: function(target) {
    this._scheduleSync(target, 'back');
  },

  /** @private */
  _scheduleSync: function(obj, dir) {
    var guid = guidFor(obj), existingDir = this[guid];

    // if we haven't scheduled the binding yet, schedule it
    if (!existingDir) {
      Ember.run.schedule('sync', this, this._sync, obj);
      this[guid] = dir;
    }

    // If both a 'back' and 'fwd' sync have been scheduled on the same object,
    // default to a 'fwd' sync so that it remains deterministic.
    if (existingDir === 'back' && dir === 'fwd') {
      this[guid] = 'fwd';
    }
  },

  /** @private */
  _sync: function(obj) {
    var log = Ember.LOG_BINDINGS;

    // don't synchronize destroyed objects or disconnected bindings
    if (obj.isDestroyed || !this._readyToSync) { return; }

    // get the direction of the binding for the object we are
    // synchronizing from
    var guid = guidFor(obj), direction = this[guid];

    var fromPath = this._from, toPath = this._to;

    delete this[guid];

    // if we're synchronizing from the remote object...
    if (direction === 'fwd') {
      var fromValue = getTransformedFromValue(obj, this);
      if (log) {
        Ember.Logger.log(' ', this.toString(), '->', fromValue, obj);
      }
      if (this._oneWay) {
        Ember.trySetPath(Ember.isGlobalPath(toPath) ? window : obj, toPath, fromValue);
      } else {
        Ember._suspendObserver(obj, toPath, this, this.toDidChange, function () {
          Ember.trySetPath(Ember.isGlobalPath(toPath) ? window : obj, toPath, fromValue);
        });
      }
    // if we're synchronizing *to* the remote object
    } else if (direction === 'back') {// && !this._oneWay) {
      var toValue = getTransformedToValue(obj, this);
      if (log) {
        Ember.Logger.log(' ', this.toString(), '<-', toValue, obj);
      }
      Ember._suspendObserver(obj, fromPath, this, this.fromDidChange, function () {
        Ember.trySetPath(Ember.isGlobalPath(fromPath) ? window : obj, fromPath, toValue);
      });
    }
  }

};

/** @private */
function mixinProperties(to, from) {
  for (var key in from) {
    if (from.hasOwnProperty(key)) {
      to[key] = from[key];
    }
  }
}

mixinProperties(Binding,
/** @scope Ember.Binding */ {

  /**
    @see Ember.Binding.prototype.from
  */
  from: function() {
    var C = this, binding = new C();
    return binding.from.apply(binding, arguments);
  },

  /**
    @see Ember.Binding.prototype.to
  */
  to: function() {
    var C = this, binding = new C();
    return binding.to.apply(binding, arguments);
  },

  /**
    @see Ember.Binding.prototype.oneWay
  */
  oneWay: function(from, flag) {
    var C = this, binding = new C(null, from);
    return binding.oneWay(flag);
  },

  /**
    @see Ember.Binding.prototype.single
  */
  single: function(from, placeholder) {
    var C = this, binding = new C(null, from);
    return binding.single(placeholder);
  },

  /**
    @see Ember.Binding.prototype.multiple
  */
  multiple: function(from) {
    var C = this, binding = new C(null, from);
    return binding.multiple();
  },

  /**
    @see Ember.Binding.prototype.transform
  */
  transform: function(from, func) {
    if (!func) {
      func = from;
      from = null;
    }
    var C = this, binding = new C(null, from);
    return binding.transform(func);
  },

  /**
    @see Ember.Binding.prototype.notEmpty
  */
  notEmpty: function(from, placeholder) {
    var C = this, binding = new C(null, from);
    return binding.notEmpty(placeholder);
  },

  /**
    @see Ember.Binding.prototype.notNull
  */
  notNull: function(from, placeholder) {
    var C = this, binding = new C(null, from);
    return binding.notNull(placeholder);
  },


  /**
    @see Ember.Binding.prototype.bool
  */
  bool: function(from) {
    var C = this, binding = new C(null, from);
    return binding.bool();
  },

  /**
    @see Ember.Binding.prototype.not
  */
  not: function(from) {
    var C = this, binding = new C(null, from);
    return binding.not();
  },

  /**
    @see Ember.Binding.prototype.isNull
  */
  isNull: function(from) {
    var C = this, binding = new C(null, from);
    return binding.isNull();
  },

  /**
    Adds a transform that forwards the logical 'AND' of values at 'pathA' and
    'pathB' whenever either source changes. Note that the transform acts
    strictly as a one-way binding, working only in the direction

        'pathA' AND 'pathB' --> value  (value returned is the result of ('pathA' && 'pathB'))

    Usage example where a delete button's `isEnabled` value is determined by
    whether something is selected in a list and whether the current user is
    allowed to delete:

        deleteButton: Ember.ButtonView.design({
          isEnabledBinding: Ember.Binding.and('MyApp.itemsController.hasSelection', 'MyApp.userController.canDelete')
        })

    @param {String} pathA The first part of the conditional
    @param {String} pathB The second part of the conditional
  */
  and: function(pathA, pathB) {
    var C = this, binding = new C(null, pathA).oneWay();
    binding._operand = pathB;
    binding._operation = AND_OPERATION;
    return binding;
  },

  /**
    Adds a transform that forwards the 'OR' of values at 'pathA' and
    'pathB' whenever either source changes. Note that the transform acts
    strictly as a one-way binding, working only in the direction

        'pathA' AND 'pathB' --> value  (value returned is the result of ('pathA' || 'pathB'))

    @param {String} pathA The first part of the conditional
    @param {String} pathB The second part of the conditional
  */
  or: function(pathA, pathB) {
    var C = this, binding = new C(null, pathA).oneWay();
    binding._operand = pathB;
    binding._operation = OR_OPERATION;
    return binding;
  },

  /**
    Registers a custom transform for use in bindings.

    @param {String} name The name of the transform
    @param {Function} transform The transformation function
  */
  registerTransform: function(name, transform) {
    this.prototype[name] = transform;
    this[name] = function(from) {
      var C = this, binding = new C(null, from), args;
      args = Array.prototype.slice.call(arguments, 1);
      return binding[name].apply(binding, args);
    };
  }

});

/**
  @class

  A binding simply connects the properties of two objects so that whenever the
  value of one property changes, the other property will be changed also. You
  do not usually work with Binding objects directly but instead describe
  bindings in your class definition using something like:

        valueBinding: "MyApp.someController.title"

  This will create a binding from `MyApp.someController.title` to the `value`
  property of your object instance automatically. Now the two values will be
  kept in sync.

  ## Customizing Your Bindings

  In addition to synchronizing values, bindings can also perform some basic
  transforms on values. These transforms can help to make sure the data fed
  into one object always meets the expectations of that object regardless of
  what the other object outputs.

  To customize a binding, you can use one of the many helper methods defined
  on Ember.Binding like so:

        valueBinding: Ember.Binding.single("MyApp.someController.title")

  This will create a binding just like the example above, except that now the
  binding will convert the value of `MyApp.someController.title` to a single
  object (removing any arrays) before applying it to the `value` property of
  your object.

  You can also chain helper methods to build custom bindings like so:

        valueBinding: Ember.Binding.single("MyApp.someController.title").notEmpty("(EMPTY)")

  This will force the value of MyApp.someController.title to be a single value
  and then check to see if the value is "empty" (null, undefined, empty array,
  or an empty string). If it is empty, the value will be set to the string
  "(EMPTY)".

  ## One Way Bindings

  One especially useful binding customization you can use is the `oneWay()`
  helper. This helper tells Ember that you are only interested in
  receiving changes on the object you are binding from. For example, if you
  are binding to a preference and you want to be notified if the preference
  has changed, but your object will not be changing the preference itself, you
  could do:

        bigTitlesBinding: Ember.Binding.oneWay("MyApp.preferencesController.bigTitles")

  This way if the value of MyApp.preferencesController.bigTitles changes the
  "bigTitles" property of your object will change also. However, if you
  change the value of your "bigTitles" property, it will not update the
  preferencesController.

  One way bindings are almost twice as fast to setup and twice as fast to
  execute because the binding only has to worry about changes to one side.

  You should consider using one way bindings anytime you have an object that
  may be created frequently and you do not intend to change a property; only
  to monitor it for changes. (such as in the example above).

  ## Adding Custom Transforms

  In addition to using the standard helpers provided by Ember, you can
  also defined your own custom transform functions which will be used to
  convert the value. To do this, just define your transform function and add
  it to the binding with the transform() helper. The following example will
  not allow Integers less than ten. Note that it checks the value of the
  bindings and allows all other values to pass:

        valueBinding: Ember.Binding.transform(function(value, binding) {
          return ((Ember.typeOf(value) === 'number') && (value < 10)) ? 10 : value;
        }).from("MyApp.someController.value")

  If you would like to instead use this transform on a number of bindings,
  you can also optionally add your own helper method to Ember.Binding. This
  method should simply return the value of `this.transform()`. The example
  below adds a new helper called `notLessThan()` which will limit the value to
  be not less than the passed minimum:

      Ember.Binding.registerTransform('notLessThan', function(minValue) {
        return this.transform(function(value, binding) {
          return ((Ember.typeOf(value) === 'number') && (value < minValue)) ? minValue : value;
        });
      });

  You could specify this in your core.js file, for example. Then anywhere in
  your application you can use it to define bindings like so:

        valueBinding: Ember.Binding.from("MyApp.someController.value").notLessThan(10)

  Also, remember that helpers are chained so you can use your helper along
  with any other helpers. The example below will create a one way binding that
  does not allow empty values or values less than 10:

        valueBinding: Ember.Binding.oneWay("MyApp.someController.value").notEmpty().notLessThan(10)

  Finally, it's also possible to specify bi-directional transforms. To do this,
  you can pass a hash to `transform` with `to` and `from`. In the following
  example, we are expecting a lowercase string that we want to transform to
  uppercase.

        valueBinding: Ember.Binding.transform({
          to:   function(value, binding) { return value.toUpperCase(); },
          from: function(value, binding) { return value.toLowerCase(); }

  ## How to Manually Adding Binding

  All of the examples above show you how to configure a custom binding, but
  the result of these customizations will be a binding template, not a fully
  active binding. The binding will actually become active only when you
  instantiate the object the binding belongs to. It is useful however, to
  understand what actually happens when the binding is activated.

  For a binding to function it must have at least a "from" property and a "to"
  property. The from property path points to the object/key that you want to
  bind from while the to path points to the object/key you want to bind to.

  When you define a custom binding, you are usually describing the property
  you want to bind from (such as "MyApp.someController.value" in the examples
  above). When your object is created, it will automatically assign the value
  you want to bind "to" based on the name of your binding key. In the
  examples above, during init, Ember objects will effectively call
  something like this on your binding:

        binding = Ember.Binding.from(this.valueBinding).to("value");

  This creates a new binding instance based on the template you provide, and
  sets the to path to the "value" property of the new object. Now that the
  binding is fully configured with a "from" and a "to", it simply needs to be
  connected to become active. This is done through the connect() method:

        binding.connect(this);

  Note that when you connect a binding you pass the object you want it to be
  connected to.  This object will be used as the root for both the from and
  to side of the binding when inspecting relative paths.  This allows the
  binding to be automatically inherited by subclassed objects as well.

  Now that the binding is connected, it will observe both the from and to side
  and relay changes.

  If you ever needed to do so (you almost never will, but it is useful to
  understand this anyway), you could manually create an active binding by
  using the Ember.bind() helper method. (This is the same method used by
  to setup your bindings on objects):

        Ember.bind(MyApp.anotherObject, "value", "MyApp.someController.value");

  Both of these code fragments have the same effect as doing the most friendly
  form of binding creation like so:

        MyApp.anotherObject = Ember.Object.create({
          valueBinding: "MyApp.someController.value",

          // OTHER CODE FOR THIS OBJECT...

        });

  Ember's built in binding creation method makes it easy to automatically
  create bindings for you. You should always use the highest-level APIs
  available, even if you understand how it works underneath.

  @since Ember 0.9
*/
Ember.Binding = Binding;

/**
  Global helper method to create a new binding.  Just pass the root object
  along with a to and from path to create and connect the binding.  The new
  binding object will be returned which you can further configure with
  transforms and other conditions.

  @param {Object} obj
    The root object of the transform.

  @param {String} to
    The path to the 'to' side of the binding.  Must be relative to obj.

  @param {String} from
    The path to the 'from' side of the binding.  Must be relative to obj or
    a global path.

  @returns {Ember.Binding} binding instance
*/
Ember.bind = function(obj, to, from) {
  return new Ember.Binding(to, from).connect(obj);
};

Ember.oneWay = function(obj, to, from) {
  return new Ember.Binding(to, from).oneWay().connect(obj);
};

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var Mixin, MixinDelegate, REQUIRED, Alias;
var classToString, superClassString;

var a_map = Ember.ArrayUtils.map;
var a_indexOf = Ember.ArrayUtils.indexOf;
var a_forEach = Ember.ArrayUtils.forEach;
var a_slice = Array.prototype.slice;
var EMPTY_META = {}; // dummy for non-writable meta
var META_SKIP = { __emberproto__: true, __ember_count__: true };

var o_create = Ember.platform.create;

/** @private */
function meta(obj, writable) {
  var m = Ember.meta(obj, writable!==false), ret = m.mixins;
  if (writable===false) return ret || EMPTY_META;

  if (!ret) {
    ret = m.mixins = { __emberproto__: obj };
  } else if (ret.__emberproto__ !== obj) {
    ret = m.mixins = o_create(ret);
    ret.__emberproto__ = obj;
  }
  return ret;
}

/** @private */
function initMixin(mixin, args) {
  if (args && args.length > 0) {
    mixin.mixins = a_map(args, function(x) {
      if (x instanceof Mixin) return x;

      // Note: Manually setup a primitive mixin here.  This is the only
      // way to actually get a primitive mixin.  This way normal creation
      // of mixins will give you combined mixins...
      var mixin = new Mixin();
      mixin.properties = x;
      return mixin;
    });
  }
  return mixin;
}

var NATIVES = [Boolean, Object, Number, Array, Date, String];
/** @private */
function isMethod(obj) {
  if ('function' !== typeof obj || obj.isMethod===false) return false;
  return a_indexOf(NATIVES, obj)<0;
}

/** @private */
function mergeMixins(mixins, m, descs, values, base) {
  var len = mixins.length, idx, mixin, guid, props, value, key, ovalue, concats;

  /** @private */
  function removeKeys(keyName) {
    delete descs[keyName];
    delete values[keyName];
  }

  for(idx=0;idx<len;idx++) {

    mixin = mixins[idx];
    if (!mixin) throw new Error('Null value found in Ember.mixin()');

    if (mixin instanceof Mixin) {
      guid = Ember.guidFor(mixin);
      if (m[guid]) continue;
      m[guid] = mixin;
      props = mixin.properties;
    } else {
      props = mixin; // apply anonymous mixin properties
    }

    if (props) {

      // reset before adding each new mixin to pickup concats from previous
      concats = values.concatenatedProperties || base.concatenatedProperties;
      if (props.concatenatedProperties) {
        concats = concats ? concats.concat(props.concatenatedProperties) : props.concatenatedProperties;
      }

      for (key in props) {
        if (!props.hasOwnProperty(key)) continue;
        value = props[key];
        if (value instanceof Ember.Descriptor) {
          if (value === REQUIRED && descs[key]) { continue; }

          descs[key]  = value;
          values[key] = undefined;
        } else {

          // impl super if needed...
          if (isMethod(value)) {
            ovalue = (descs[key] === Ember.SIMPLE_PROPERTY) && values[key];
            if (!ovalue) ovalue = base[key];
            if ('function' !== typeof ovalue) ovalue = null;
            if (ovalue) {
              var o = value.__ember_observes__, ob = value.__ember_observesBefore__;
              value = Ember.wrap(value, ovalue);
              value.__ember_observes__ = o;
              value.__ember_observesBefore__ = ob;
            }
          } else if ((concats && a_indexOf(concats, key)>=0) || key === 'concatenatedProperties') {
            var baseValue = values[key] || base[key];
            value = baseValue ? baseValue.concat(value) : Ember.makeArray(value);
          }

          descs[key]  = Ember.SIMPLE_PROPERTY;
          values[key] = value;
        }
      }

      // manually copy toString() because some JS engines do not enumerate it
      if (props.hasOwnProperty('toString')) {
        base.toString = props.toString;
      }

    } else if (mixin.mixins) {
      mergeMixins(mixin.mixins, m, descs, values, base);
      if (mixin._without) a_forEach(mixin._without, removeKeys);
    }
  }
}

/** @private */
var defineProperty = Ember.defineProperty;

/** @private */
function writableReq(obj) {
  var m = Ember.meta(obj), req = m.required;
  if (!req || (req.__emberproto__ !== obj)) {
    req = m.required = req ? o_create(req) : { __ember_count__: 0 };
    req.__emberproto__ = obj;
  }
  return req;
}

/** @private */
function getObserverPaths(value) {
  return ('function' === typeof value) && value.__ember_observes__;
}

/** @private */
function getBeforeObserverPaths(value) {
  return ('function' === typeof value) && value.__ember_observesBefore__;
}

var IS_BINDING = Ember.IS_BINDING = /^.+Binding$/;

function detectBinding(obj, key, m) {
  if (IS_BINDING.test(key)) {
    var bindings = m.bindings;
    if (!bindings) {
      bindings = m.bindings = { __emberproto__: obj };
    } else if (bindings.__emberproto__ !== obj) {
      bindings = m.bindings = o_create(m.bindings);
      bindings.__emberproto__ = obj;
    }
    bindings[key] = true;
  }
}

function connectBindings(obj, m) {
  if (m === undefined) {
    m = Ember.meta(obj);
  }
  var bindings = m.bindings, key, binding;
  if (bindings) {
    for (key in bindings) {
      binding = key !== '__emberproto__' && obj[key];
      if (binding) {
        if (binding instanceof Ember.Binding) {
          binding = binding.copy(); // copy prototypes' instance
          binding.to(key.slice(0, -7));
        } else {
          binding = new Ember.Binding(key.slice(0,-7), binding);
        }
        binding.connect(obj);
        obj[key] = binding;
      }
    }
  }
}

/** @private */
function applyMixin(obj, mixins, partial) {
  var descs = {}, values = {}, m = Ember.meta(obj), req = m.required;
  var key, willApply, didApply, value, desc;

  // Go through all mixins and hashes passed in, and:
  //
  // * Handle concatenated properties
  // * Set up _super wrapping if necessary
  // * Set up descriptors (simple, watched or computed properties)
  // * Copying `toString` in broken browsers
  mergeMixins(mixins, meta(obj), descs, values, obj);

  if (MixinDelegate.detect(obj)) {
    willApply = values.willApplyProperty || obj.willApplyProperty;
    didApply  = values.didApplyProperty || obj.didApplyProperty;
  }

  for(key in descs) {
    if (!descs.hasOwnProperty(key)) continue;

    desc = descs[key];
    value = values[key];

    if (desc === REQUIRED) {
      if (!(key in obj)) {
        if (!partial) throw new Error('Required property not defined: '+key);

        // for partial applies add to hash of required keys
        req = writableReq(obj);
        req.__ember_count__++;
        req[key] = true;
      }

    } else {

      while (desc instanceof Alias) {

        var altKey = desc.methodName;
        if (descs[altKey]) {
          value = values[altKey];
          desc  = descs[altKey];
        } else if (m.descs[altKey]) {
          desc  = m.descs[altKey];
          value = desc.val(obj, altKey);
        } else {
          value = obj[altKey];
          desc  = Ember.SIMPLE_PROPERTY;
        }
      }

      if (willApply) willApply.call(obj, key);

      var observerPaths = getObserverPaths(value),
          curObserverPaths = observerPaths && getObserverPaths(obj[key]),
          beforeObserverPaths = getBeforeObserverPaths(value),
          curBeforeObserverPaths = beforeObserverPaths && getBeforeObserverPaths(obj[key]),
          len, idx;

      if (curObserverPaths) {
        len = curObserverPaths.length;
        for(idx=0;idx<len;idx++) {
          Ember.removeObserver(obj, curObserverPaths[idx], null, key);
        }
      }

      if (curBeforeObserverPaths) {
        len = curBeforeObserverPaths.length;
        for(idx=0;idx<len;idx++) {
          Ember.removeBeforeObserver(obj, curBeforeObserverPaths[idx], null,key);
        }
      }

      detectBinding(obj, key, m);

      defineProperty(obj, key, desc, value);

      if (observerPaths) {
        len = observerPaths.length;
        for(idx=0;idx<len;idx++) {
          Ember.addObserver(obj, observerPaths[idx], null, key);
        }
      }

      if (beforeObserverPaths) {
        len = beforeObserverPaths.length;
        for(idx=0;idx<len;idx++) {
          Ember.addBeforeObserver(obj, beforeObserverPaths[idx], null, key);
        }
      }

      if (req && req[key]) {
        req = writableReq(obj);
        req.__ember_count__--;
        req[key] = false;
      }

      if (didApply) didApply.call(obj, key);

    }
  }

  if (!partial) { // don't apply to prototype
    value = connectBindings(obj, m);
  }

  // Make sure no required attrs remain
  if (!partial && req && req.__ember_count__>0) {
    var keys = [];
    for(key in req) {
      if (META_SKIP[key]) continue;
      keys.push(key);
    }
    throw new Error('Required properties not defined: '+keys.join(','));
  }
  return obj;
}

Ember.mixin = function(obj) {
  var args = a_slice.call(arguments, 1);
  return applyMixin(obj, args, false);
};


/**
  @constructor
*/
Ember.Mixin = function() { return initMixin(this, arguments); };

/** @private */
Mixin = Ember.Mixin;

/** @private */
Mixin._apply = applyMixin;

Mixin.applyPartial = function(obj) {
  var args = a_slice.call(arguments, 1);
  return applyMixin(obj, args, true);
};

Mixin.finishPartial = function(obj) {
  connectBindings(obj);
  return obj;
};

Mixin.create = function() {
  classToString.processed = false;
  var M = this;
  return initMixin(new M(), arguments);
};

Mixin.prototype.reopen = function() {

  var mixin, tmp;

  if (this.properties) {
    mixin = Mixin.create();
    mixin.properties = this.properties;
    delete this.properties;
    this.mixins = [mixin];
  }

  var len = arguments.length, mixins = this.mixins, idx;

  for(idx=0;idx<len;idx++) {
    mixin = arguments[idx];
    if (mixin instanceof Mixin) {
      mixins.push(mixin);
    } else {
      tmp = Mixin.create();
      tmp.properties = mixin;
      mixins.push(tmp);
    }
  }

  return this;
};

var TMP_ARRAY = [];
Mixin.prototype.apply = function(obj) {
  TMP_ARRAY[0] = this;
  var ret = applyMixin(obj, TMP_ARRAY, false);
  TMP_ARRAY.length=0;
  return ret;
};

Mixin.prototype.applyPartial = function(obj) {
  TMP_ARRAY[0] = this;
  var ret = applyMixin(obj, TMP_ARRAY, true);
  TMP_ARRAY.length=0;
  return ret;
};

/** @private */
function _detect(curMixin, targetMixin, seen) {
  var guid = Ember.guidFor(curMixin);

  if (seen[guid]) return false;
  seen[guid] = true;

  if (curMixin === targetMixin) return true;
  var mixins = curMixin.mixins, loc = mixins ? mixins.length : 0;
  while(--loc >= 0) {
    if (_detect(mixins[loc], targetMixin, seen)) return true;
  }
  return false;
}

Mixin.prototype.detect = function(obj) {
  if (!obj) return false;
  if (obj instanceof Mixin) return _detect(obj, this, {});
  return !!meta(obj, false)[Ember.guidFor(this)];
};

Mixin.prototype.without = function() {
  var ret = new Mixin(this);
  ret._without = a_slice.call(arguments);
  return ret;
};

/** @private */
function _keys(ret, mixin, seen) {
  if (seen[Ember.guidFor(mixin)]) return;
  seen[Ember.guidFor(mixin)] = true;

  if (mixin.properties) {
    var props = mixin.properties;
    for(var key in props) {
      if (props.hasOwnProperty(key)) ret[key] = true;
    }
  } else if (mixin.mixins) {
    a_forEach(mixin.mixins, function(x) { _keys(ret, x, seen); });
  }
}

Mixin.prototype.keys = function() {
  var keys = {}, seen = {}, ret = [];
  _keys(keys, this, seen);
  for(var key in keys) {
    if (keys.hasOwnProperty(key)) ret.push(key);
  }
  return ret;
};

/** @private - make Mixin's have nice displayNames */

var NAME_KEY = Ember.GUID_KEY+'_name';
var get = Ember.get;

/** @private */
function processNames(paths, root, seen) {
  var idx = paths.length;
  for(var key in root) {
    if (!root.hasOwnProperty || !root.hasOwnProperty(key)) continue;
    var obj = root[key];
    paths[idx] = key;

    if (obj && obj.toString === classToString) {
      obj[NAME_KEY] = paths.join('.');
    } else if (obj && get(obj, 'isNamespace')) {
      if (seen[Ember.guidFor(obj)]) continue;
      seen[Ember.guidFor(obj)] = true;
      processNames(paths, obj, seen);
    }

  }
  paths.length = idx; // cut out last item
}

/** @private */
function findNamespaces() {
  var Namespace = Ember.Namespace, obj, isNamespace;

  if (Namespace.PROCESSED) { return; }

  for (var prop in window) {
    //  get(window.globalStorage, 'isNamespace') would try to read the storage for domain isNamespace and cause exception in Firefox.
    // globalStorage is a storage obsoleted by the WhatWG storage specification. See https://developer.mozilla.org/en/DOM/Storage#globalStorage
    if (prop === "globalStorage" && window.StorageList && window.globalStorage instanceof window.StorageList) { continue; }
    // Unfortunately, some versions of IE don't support window.hasOwnProperty
    if (window.hasOwnProperty && !window.hasOwnProperty(prop)) { continue; }

    // At times we are not allowed to access certain properties for security reasons.
    // There are also times where even if we can access them, we are not allowed to access their properties.
    try {
      obj = window[prop];
      isNamespace = obj && get(obj, 'isNamespace');
    } catch (e) {
      continue;
    }

    if (isNamespace) {
      Ember.deprecate("Namespaces should not begin with lowercase.", /^[A-Z]/.test(prop));
      obj[NAME_KEY] = prop;
    }
  }
}

Ember.identifyNamespaces = findNamespaces;

/** @private */
superClassString = function(mixin) {
  var superclass = mixin.superclass;
  if (superclass) {
    if (superclass[NAME_KEY]) { return superclass[NAME_KEY]; }
    else { return superClassString(superclass); }
  } else {
    return;
  }
};

/** @private */
classToString = function() {
  var Namespace = Ember.Namespace, namespace;

  // TODO: Namespace should really be in Metal
  if (Namespace) {
    if (!this[NAME_KEY] && !classToString.processed) {
      if (!Namespace.PROCESSED) {
        findNamespaces();
        Namespace.PROCESSED = true;
      }

      classToString.processed = true;

      var namespaces = Namespace.NAMESPACES;
      for (var i=0, l=namespaces.length; i<l; i++) {
        namespace = namespaces[i];
        processNames([namespace.toString()], namespace, {});
      }
    }
  }

  if (this[NAME_KEY]) {
    return this[NAME_KEY];
  } else {
    var str = superClassString(this);
    if (str) {
      return "(subclass of " + str + ")";
    } else {
      return "(unknown mixin)";
    }
  }
};

Mixin.prototype.toString = classToString;

// returns the mixins currently applied to the specified object
// TODO: Make Ember.mixin
Mixin.mixins = function(obj) {
  var ret = [], mixins = meta(obj, false), key, mixin;
  for(key in mixins) {
    if (META_SKIP[key]) continue;
    mixin = mixins[key];

    // skip primitive mixins since these are always anonymous
    if (!mixin.properties) ret.push(mixins[key]);
  }
  return ret;
};

REQUIRED = new Ember.Descriptor();
REQUIRED.toString = function() { return '(Required Property)'; };

Ember.required = function() {
  return REQUIRED;
};

/** @private */
Alias = function(methodName) {
  this.methodName = methodName;
};
Alias.prototype = new Ember.Descriptor();

Ember.alias = function(methodName) {
  return new Alias(methodName);
};

Ember.MixinDelegate = Mixin.create({

  willApplyProperty: Ember.required(),
  didApplyProperty:  Ember.required()

});

/** @private */
MixinDelegate = Ember.MixinDelegate;


// ..........................................................
// OBSERVER HELPER
//

Ember.observer = function(func) {
  var paths = a_slice.call(arguments, 1);
  func.__ember_observes__ = paths;
  return func;
};

Ember.beforeObserver = function(func) {
  var paths = a_slice.call(arguments, 1);
  func.__ember_observesBefore__ = paths;
  return func;
};







})();



(function() {
// ==========================================================================
// Project:  Ember Metal
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================

})();

(function() {
/**
 * @license
 * ==========================================================================
 * Ember
 * Copyright ©2006-2011, Strobe Inc. and contributors.
 * Portions copyright ©2008-2011 Apple Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * For more information about Ember, visit http://www.emberjs.com
 *
 * ==========================================================================
 */

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
/*globals ENV */
var indexOf = Ember.ArrayUtils.indexOf;

// ........................................
// TYPING & ARRAY MESSAGING
//

var TYPE_MAP = {};
var t ="Boolean Number String Function Array Date RegExp Object".split(" ");
Ember.ArrayUtils.forEach(t, function(name) {
	TYPE_MAP[ "[object " + name + "]" ] = name.toLowerCase();
});

var toString = Object.prototype.toString;

/**
  Returns a consistent type for the passed item.

  Use this instead of the built-in Ember.typeOf() to get the type of an item.
  It will return the same result across all browsers and includes a bit
  more detail.  Here is what will be returned:

      | Return Value  | Meaning                                              |
      |---------------|------------------------------------------------------|
      | 'string'      | String primitive                                     |
      | 'number'      | Number primitive                                     |
      | 'boolean'     | Boolean primitive                                    |
      | 'null'        | Null value                                           |
      | 'undefined'   | Undefined value                                      |
      | 'function'    | A function                                           |
      | 'array'       | An instance of Array                                 |
      | 'class'       | A Ember class (created using Ember.Object.extend())  |
      | 'instance'    | A Ember object instance                              |
      | 'error'       | An instance of the Error object                      |
      | 'object'      | A JavaScript object not inheriting from Ember.Object |

  Examples:

      Ember.typeOf();                      => 'undefined'
      Ember.typeOf(null);                  => 'null'
      Ember.typeOf(undefined);             => 'undefined'
      Ember.typeOf('michael');             => 'string'
      Ember.typeOf(101);                   => 'number'
      Ember.typeOf(true);                  => 'boolean'
      Ember.typeOf(Ember.makeArray);       => 'function'
      Ember.typeOf([1,2,90]);              => 'array'
      Ember.typeOf(Ember.Object.extend()); => 'class'
      Ember.typeOf(Ember.Object.create()); => 'instance'
      Ember.typeOf(new Error('teamocil')); => 'error'

      // "normal" JavaScript object
      Ember.typeOf({a: 'b'});              => 'object'

  @param item {Object} the item to check
  @returns {String} the type
*/
Ember.typeOf = function(item) {
  var ret;

  ret = (item === null || item === undefined) ? String(item) : TYPE_MAP[toString.call(item)] || 'object';

  if (ret === 'function') {
    if (Ember.Object && Ember.Object.detect(item)) ret = 'class';
  } else if (ret === 'object') {
    if (item instanceof Error) ret = 'error';
    else if (Ember.Object && item instanceof Ember.Object) ret = 'instance';
    else ret = 'object';
  }

  return ret;
};

/**
  Returns true if the passed value is null or undefined.  This avoids errors
  from JSLint complaining about use of ==, which can be technically
  confusing.

      Ember.none();             => true
      Ember.none(null);         => true
      Ember.none(undefined);    => true
      Ember.none('');           => false
      Ember.none([]);           => false
      Ember.none(function(){}); => false

  @param {Object} obj Value to test
  @returns {Boolean}
*/
Ember.none = function(obj) {
  return obj === null || obj === undefined;
};

/**
  Verifies that a value is null or an empty string | array | function.

  Constrains the rules on `Ember.none` by returning false for empty
  string and empty arrays.

      Ember.empty();               => true
      Ember.empty(null);           => true
      Ember.empty(undefined);      => true
      Ember.empty('');             => true
      Ember.empty([]);             => true
      Ember.empty('tobias fünke'); => false
      Ember.empty([0,1,2]);        => false

  @param {Object} obj Value to test
  @returns {Boolean}
*/
Ember.empty = function(obj) {
  return obj === null || obj === undefined || (obj.length === 0 && typeof obj !== 'function');
};

/**
 This will compare two javascript values of possibly different types.
 It will tell you which one is greater than the other by returning:

  - -1 if the first is smaller than the second,
  - 0 if both are equal,
  - 1 if the first is greater than the second.

 The order is calculated based on Ember.ORDER_DEFINITION, if types are different.
 In case they have the same type an appropriate comparison for this type is made.

    Ember.compare('hello', 'hello');  => 0
    Ember.compare('abc', 'dfg');      => -1
    Ember.compare(2, 1);              => 1

 @param {Object} v First value to compare
 @param {Object} w Second value to compare
 @returns {Number} -1 if v < w, 0 if v = w and 1 if v > w.
*/
Ember.compare = function compare(v, w) {
  if (v === w) { return 0; }

  var type1 = Ember.typeOf(v);
  var type2 = Ember.typeOf(w);

  var Comparable = Ember.Comparable;
  if (Comparable) {
    if (type1==='instance' && Comparable.detect(v.constructor)) {
      return v.constructor.compare(v, w);
    }

    if (type2 === 'instance' && Comparable.detect(w.constructor)) {
      return 1-w.constructor.compare(w, v);
    }
  }

  // If we haven't yet generated a reverse-mapping of Ember.ORDER_DEFINITION,
  // do so now.
  var mapping = Ember.ORDER_DEFINITION_MAPPING;
  if (!mapping) {
    var order = Ember.ORDER_DEFINITION;
    mapping = Ember.ORDER_DEFINITION_MAPPING = {};
    var idx, len;
    for (idx = 0, len = order.length; idx < len;  ++idx) {
      mapping[order[idx]] = idx;
    }

    // We no longer need Ember.ORDER_DEFINITION.
    delete Ember.ORDER_DEFINITION;
  }

  var type1Index = mapping[type1];
  var type2Index = mapping[type2];

  if (type1Index < type2Index) { return -1; }
  if (type1Index > type2Index) { return 1; }

  // types are equal - so we have to check values now
  switch (type1) {
    case 'boolean':
    case 'number':
      if (v < w) { return -1; }
      if (v > w) { return 1; }
      return 0;

    case 'string':
      var comp = v.localeCompare(w);
      if (comp < 0) { return -1; }
      if (comp > 0) { return 1; }
      return 0;

    case 'array':
      var vLen = v.length;
      var wLen = w.length;
      var l = Math.min(vLen, wLen);
      var r = 0;
      var i = 0;
      while (r === 0 && i < l) {
        r = compare(v[i],w[i]);
        i++;
      }
      if (r !== 0) { return r; }

      // all elements are equal now
      // shorter array should be ordered first
      if (vLen < wLen) { return -1; }
      if (vLen > wLen) { return 1; }
      // arrays are equal now
      return 0;

    case 'instance':
      if (Ember.Comparable && Ember.Comparable.detect(v)) {
        return v.compare(v, w);
      }
      return 0;

    default:
      return 0;
  }
};

/** @private */
function _copy(obj, deep, seen, copies) {
  var ret, loc, key;

  // primitive data types are immutable, just return them.
  if ('object' !== typeof obj || obj===null) return obj;

  // avoid cyclical loops
  if (deep && (loc=indexOf(seen, obj))>=0) return copies[loc];

  Ember.assert('Cannot clone an Ember.Object that does not implement Ember.Copyable', !(obj instanceof Ember.Object) || (Ember.Copyable && Ember.Copyable.detect(obj)));

  // IMPORTANT: this specific test will detect a native array only.  Any other
  // object will need to implement Copyable.
  if (Ember.typeOf(obj) === 'array') {
    ret = obj.slice();
    if (deep) {
      loc = ret.length;
      while(--loc>=0) ret[loc] = _copy(ret[loc], deep, seen, copies);
    }
  } else if (Ember.Copyable && Ember.Copyable.detect(obj)) {
    ret = obj.copy(deep, seen, copies);
  } else {
    ret = {};
    for(key in obj) {
      if (!obj.hasOwnProperty(key)) continue;
      ret[key] = deep ? _copy(obj[key], deep, seen, copies) : obj[key];
    }
  }

  if (deep) {
    seen.push(obj);
    copies.push(ret);
  }

  return ret;
}

/**
  Creates a clone of the passed object. This function can take just about
  any type of object and create a clone of it, including primitive values
  (which are not actually cloned because they are immutable).

  If the passed object implements the clone() method, then this function
  will simply call that method and return the result.

  @param {Object} object The object to clone
  @param {Boolean} deep If true, a deep copy of the object is made
  @returns {Object} The cloned object
*/
Ember.copy = function(obj, deep) {
  // fast paths
  if ('object' !== typeof obj || obj===null) return obj; // can't copy primitives
  if (Ember.Copyable && Ember.Copyable.detect(obj)) return obj.copy(deep);
  return _copy(obj, deep, deep ? [] : null, deep ? [] : null);
};

/**
  Convenience method to inspect an object. This method will attempt to
  convert the object into a useful string description.

  @param {Object} obj The object you want to inspect.
  @returns {String} A description of the object
*/
Ember.inspect = function(obj) {
  var v, ret = [];
  for(var key in obj) {
    if (obj.hasOwnProperty(key)) {
      v = obj[key];
      if (v === 'toString') { continue; } // ignore useless items
      if (Ember.typeOf(v) === 'function') { v = "function() { ... }"; }
      ret.push(key + ": " + v);
    }
  }
  return "{" + ret.join(" , ") + "}";
};

/**
  Compares two objects, returning true if they are logically equal.  This is
  a deeper comparison than a simple triple equal. For sets it will compare the
  internal objects.  For any other object that implements `isEqual()` it will 
  respect that method.

      Ember.isEqual('hello', 'hello');  => true
      Ember.isEqual(1, 2);              => false
      Ember.isEqual([4,2], [4,2]);      => false

  @param {Object} a first object to compare
  @param {Object} b second object to compare
  @returns {Boolean}
*/
Ember.isEqual = function(a, b) {
  if (a && 'function'===typeof a.isEqual) return a.isEqual(b);
  return a === b;
};

/**
  @private
  Used by Ember.compare
*/
Ember.ORDER_DEFINITION = Ember.ENV.ORDER_DEFINITION || [
  'undefined',
  'null',
  'boolean',
  'number',
  'string',
  'array',
  'object',
  'instance',
  'function',
  'class'
];

/**
  Returns all of the keys defined on an object or hash. This is useful
  when inspecting objects for debugging.  On browsers that support it, this
  uses the native Object.keys implementation.

  @function
  @param {Object} obj
  @returns {Array} Array containing keys of obj
*/
Ember.keys = Object.keys;

if (!Ember.keys) {
  Ember.keys = function(obj) {
    var ret = [];
    for(var key in obj) {
      if (obj.hasOwnProperty(key)) { ret.push(key); }
    }
    return ret;
  };
}

// ..........................................................
// ERROR
//

/**
  @class

  A subclass of the JavaScript Error object for use in Ember.
*/
Ember.Error = function() {
  var tmp = Error.prototype.constructor.apply(this, arguments);

  for (var p in tmp) {
    if (tmp.hasOwnProperty(p)) { this[p] = tmp[p]; }
  }
  this.message = tmp.message;
};

Ember.Error.prototype = Ember.create(Error.prototype);

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================

/** @private **/
var STRING_DASHERIZE_REGEXP = (/[ _]/g);
var STRING_DASHERIZE_CACHE = {};
var STRING_DECAMELIZE_REGEXP = (/([a-z])([A-Z])/g);
var STRING_CAMELIZE_REGEXP = (/(\-|_|\s)+(.)?/g);
var STRING_UNDERSCORE_REGEXP_1 = (/([a-z\d])([A-Z]+)/g);
var STRING_UNDERSCORE_REGEXP_2 = (/\-|\s+/g);

/**
  Defines the hash of localized strings for the current language.  Used by
  the `Ember.String.loc()` helper.  To localize, add string values to this
  hash.

  @property {String}
*/
Ember.STRINGS = {};

/**
  Defines string helper methods including string formatting and localization.
  Unless Ember.EXTEND_PROTOTYPES = false these methods will also be added to the
  String.prototype as well.

  @namespace
*/
Ember.String = {

  /**
    Apply formatting options to the string.  This will look for occurrences
    of %@ in your string and substitute them with the arguments you pass into
    this method.  If you want to control the specific order of replacement,
    you can add a number after the key as well to indicate which argument
    you want to insert.

    Ordered insertions are most useful when building loc strings where values
    you need to insert may appear in different orders.

        "Hello %@ %@".fmt('John', 'Doe') => "Hello John Doe"
        "Hello %@2, %@1".fmt('John', 'Doe') => "Hello Doe, John"

    @param {Object...} [args]
    @returns {String} formatted string
  */
  fmt: function(str, formats) {
    // first, replace any ORDERED replacements.
    var idx  = 0; // the current index for non-numerical replacements
    return str.replace(/%@([0-9]+)?/g, function(s, argIndex) {
      argIndex = (argIndex) ? parseInt(argIndex,0) - 1 : idx++ ;
      s = formats[argIndex];
      return ((s === null) ? '(null)' : (s === undefined) ? '' : s).toString();
    }) ;
  },

  /**
    Formats the passed string, but first looks up the string in the localized
    strings hash.  This is a convenient way to localize text.  See
    `Ember.String.fmt()` for more information on formatting.

    Note that it is traditional but not required to prefix localized string
    keys with an underscore or other character so you can easily identify
    localized strings.

        Ember.STRINGS = {
          '_Hello World': 'Bonjour le monde',
          '_Hello %@ %@': 'Bonjour %@ %@'
        };

        Ember.String.loc("_Hello World");
        => 'Bonjour le monde';

        Ember.String.loc("_Hello %@ %@", ["John", "Smith"]);
        => "Bonjour John Smith";

    @param {String} str
      The string to format

    @param {Array} formats
      Optional array of parameters to interpolate into string.

    @returns {String} formatted string
  */
  loc: function(str, formats) {
    str = Ember.STRINGS[str] || str;
    return Ember.String.fmt(str, formats) ;
  },

  /**
    Splits a string into separate units separated by spaces, eliminating any
    empty strings in the process.  This is a convenience method for split that
    is mostly useful when applied to the String.prototype.

        Ember.String.w("alpha beta gamma").forEach(function(key) {
          console.log(key);
        });
        > alpha
        > beta
        > gamma

    @param {String} str 
      The string to split

    @returns {String} split string
  */
  w: function(str) { return str.split(/\s+/); },

  /**
    Converts a camelized string into all lower case separated by underscores.
    
        'innerHTML'.decamelize()         => 'inner_html'
        'action_name'.decamelize()       => 'action_name'
        'css-class-name'.decamelize()    => 'css-class-name'
        'my favorite items'.decamelize() => 'my favorite items'

    @param {String} str
      The string to decamelize.

    @returns {String} the decamelized string.
  */
  decamelize: function(str) {
    return str.replace(STRING_DECAMELIZE_REGEXP, '$1_$2').toLowerCase();
  },

  /**
    Replaces underscores or spaces with dashes.
    
        'innerHTML'.dasherize()         => 'inner-html'
        'action_name'.dasherize()       => 'action-name'
        'css-class-name'.dasherize()    => 'css-class-name'
        'my favorite items'.dasherize() => 'my-favorite-items'

    @param {String} str
      The string to dasherize.

    @returns {String} the dasherized string.
  */
  dasherize: function(str) {
    var cache = STRING_DASHERIZE_CACHE,
        ret   = cache[str];

    if (ret) {
      return ret;
    } else {
      ret = Ember.String.decamelize(str).replace(STRING_DASHERIZE_REGEXP,'-');
      cache[str] = ret;
    }

    return ret;
  },

  /**
    Returns the lowerCaseCamel form of a string.
    
        'innerHTML'.camelize()         => 'innerHTML'
        'action_name'.camelize()       => 'actionName'
        'css-class-name'.camelize()    => 'cssClassName'
        'my favorite items'.camelize() => 'myFavoriteItems'

    @param {String} str
      The string to camelize.

    @returns {String} the camelized string.
  */
  camelize: function(str) {
    return str.replace(STRING_CAMELIZE_REGEXP, function(match, separator, chr) {
      return chr ? chr.toUpperCase() : '';
    });
  },

  /**
    More general than decamelize. Returns the lower_case_and_underscored
    form of a string.

        'innerHTML'.underscore()         => 'inner_html'
        'action_name'.underscore()       => 'action_name'
        'css-class-name'.underscore()    => 'css_class_name'
        'my favorite items'.underscore() => 'my_favorite_items'

    @param {String} str
      The string to underscore.

    @returns {String} the underscored string.
  */
  underscore: function(str) {
    return str.replace(STRING_UNDERSCORE_REGEXP_1, '$1_$2').
      replace(STRING_UNDERSCORE_REGEXP_2, '_').toLowerCase();
  }
};
})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2006-2011 Strobe Inc. and contributors.
//            Portions ©2008-2011 Apple Inc. All rights reserved.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var fmt = Ember.String.fmt,
    w   = Ember.String.w,
    loc = Ember.String.loc,
    camelize = Ember.String.camelize,
    decamelize = Ember.String.decamelize,
    dasherize = Ember.String.dasherize,
    underscore = Ember.String.underscore;

if (Ember.EXTEND_PROTOTYPES) {

  /**
    @see Ember.String.fmt
  */
  String.prototype.fmt = function() {
    return fmt(this, arguments);
  };

  /**
    @see Ember.String.w
  */
  String.prototype.w = function() {
    return w(this);
  };

  /**
    @see Ember.String.loc
  */
  String.prototype.loc = function() {
    return loc(this, arguments);
  };

  /**
    @see Ember.String.camelize
  */
  String.prototype.camelize = function() {
    return camelize(this);
  };

  /**
    @see Ember.String.decamelize
  */
  String.prototype.decamelize = function() {
    return decamelize(this);
  };

  /**
    @see Ember.String.dasherize
  */
  String.prototype.dasherize = function() {
    return dasherize(this);
  };

  /**
    @see Ember.String.underscore
  */
  String.prototype.underscore = function() {
    return underscore(this);
  };

}


})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2006-2011 Strobe Inc. and contributors.
//            Portions ©2008-2011 Apple Inc. All rights reserved.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var a_slice = Array.prototype.slice;

if (Ember.EXTEND_PROTOTYPES) {

  /**
    The `property` extension of Javascript's Function prototype is available
    when Ember.EXTEND_PROTOTYPES is true, which is the default. 

    Computed properties allow you to treat a function like a property:

        MyApp.president = Ember.Object.create({
          firstName: "Barack",
          lastName: "Obama",

          fullName: function() {
            return this.get('firstName') + ' ' + this.get('lastName');

            // Call this flag to mark the function as a property
          }.property()
        });

        MyApp.president.get('fullName');    => "Barack Obama"

    Treating a function like a property is useful because they can work with
    bindings, just like any other property.

    Many computed properties have dependencies on other properties. For
    example, in the above example, the `fullName` property depends on
    `firstName` and `lastName` to determine its value. You can tell Ember.js
    about these dependencies like this:

        MyApp.president = Ember.Object.create({
          firstName: "Barack",
          lastName: "Obama",

          fullName: function() {
            return this.get('firstName') + ' ' + this.get('lastName');

            // Tell Ember.js that this computed property depends on firstName
            // and lastName
          }.property('firstName', 'lastName')
        });

    Make sure you list these dependencies so Ember.js knows when to update
    bindings that connect to a computed property. Changing a dependency
    will not immediately trigger an update of the computed property, but
    will instead clear the cache so that it is updated when the next `get`
    is called on the property.

    Note: you will usually want to use `property(...)` with `cacheable()`.

    @see Ember.ComputedProperty
    @see Ember.computed
  */
  Function.prototype.property = function() {
    var ret = Ember.computed(this);
    return ret.property.apply(ret, arguments);
  };

  /**
    The `observes` extension of Javascript's Function prototype is available
    when Ember.EXTEND_PROTOTYPES is true, which is the default. 

    You can observe property changes simply by adding the `observes`
    call to the end of your method declarations in classes that you write.
    For example:

        Ember.Object.create({
          valueObserver: function() {
            // Executes whenever the "value" property changes
          }.observes('value')
        });
    
    @see Ember.Observable
  */
  Function.prototype.observes = function() {
    this.__ember_observes__ = a_slice.call(arguments);
    return this;
  };

  /**
    The `observesBefore` extension of Javascript's Function prototype is
    available when Ember.EXTEND_PROTOTYPES is true, which is the default. 

    You can get notified when a property changes is about to happen by
    by adding the `observesBefore` call to the end of your method
    declarations in classes that you write. For example:

        Ember.Object.create({
          valueObserver: function() {
            // Executes whenever the "value" property is about to change
          }.observesBefore('value')
        });
    
    @see Ember.Observable
  */
  Function.prototype.observesBefore = function() {
    this.__ember_observesBefore__ = a_slice.call(arguments);
    return this;
  };

}


})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================





// ..........................................................
// HELPERS
//

var get = Ember.get, set = Ember.set;
var a_slice = Array.prototype.slice;
var a_indexOf = Ember.ArrayUtils.indexOf;

var contexts = [];
/** @private */
function popCtx() {
  return contexts.length===0 ? {} : contexts.pop();
}

/** @private */
function pushCtx(ctx) {
  contexts.push(ctx);
  return null;
}

/** @private */
function iter(key, value) {
  var valueProvided = arguments.length === 2;

  function i(item) {
    var cur = get(item, key);
    return valueProvided ? value===cur : !!cur;
  }
  return i ;
}

/** @private */
function xform(target, method, params) {
  method.call(target, params[0], params[2], params[3]);
}

/**
  @class

  This mixin defines the common interface implemented by enumerable objects
  in Ember.  Most of these methods follow the standard Array iteration
  API defined up to JavaScript 1.8 (excluding language-specific features that
  cannot be emulated in older versions of JavaScript).

  This mixin is applied automatically to the Array class on page load, so you
  can use any of these methods on simple arrays.  If Array already implements
  one of these methods, the mixin will not override them.

  h3. Writing Your Own Enumerable

  To make your own custom class enumerable, you need two items:

  1. You must have a length property.  This property should change whenever
     the number of items in your enumerable object changes.  If you using this
     with an Ember.Object subclass, you should be sure to change the length
     property using set().

  2. If you must implement nextObject().  See documentation.

  Once you have these two methods implement, apply the Ember.Enumerable mixin
  to your class and you will be able to enumerate the contents of your object
  like any other collection.

  h3. Using Ember Enumeration with Other Libraries

  Many other libraries provide some kind of iterator or enumeration like
  facility.  This is often where the most common API conflicts occur.
  Ember's API is designed to be as friendly as possible with other
  libraries by implementing only methods that mostly correspond to the
  JavaScript 1.8 API.

  @since Ember 0.9
*/
Ember.Enumerable = Ember.Mixin.create( /** @lends Ember.Enumerable */ {

  /** @private - compatibility */
  isEnumerable: true,

  /**
    Implement this method to make your class enumerable.

    This method will be call repeatedly during enumeration.  The index value
    will always begin with 0 and increment monotonically.  You don't have to
    rely on the index value to determine what object to return, but you should
    always check the value and start from the beginning when you see the
    requested index is 0.

    The previousObject is the object that was returned from the last call
    to nextObject for the current iteration.  This is a useful way to
    manage iteration if you are tracing a linked list, for example.

    Finally the context parameter will always contain a hash you can use as
    a "scratchpad" to maintain any other state you need in order to iterate
    properly.  The context object is reused and is not reset between
    iterations so make sure you setup the context with a fresh state whenever
    the index parameter is 0.

    Generally iterators will continue to call nextObject until the index
    reaches the your current length-1.  If you run out of data before this
    time for some reason, you should simply return undefined.

    The default implementation of this method simply looks up the index.
    This works great on any Array-like objects.

    @param index {Number} the current index of the iteration
    @param previousObject {Object} the value returned by the last call to nextObject.
    @param context {Object} a context object you can use to maintain state.
    @returns {Object} the next object in the iteration or undefined
  */
  nextObject: Ember.required(Function),

  /**
    Helper method returns the first object from a collection.  This is usually
    used by bindings and other parts of the framework to extract a single
    object if the enumerable contains only one item.

    If you override this method, you should implement it so that it will
    always return the same value each time it is called.  If your enumerable
    contains only one object, this method should always return that object.
    If your enumerable is empty, this method should return undefined.

        var arr = ["a", "b", "c"];
        arr.firstObject(); => "a"

        var arr = [];
        arr.firstObject(); => undefined

    @returns {Object} the object or undefined
  */
  firstObject: Ember.computed(function() {
    if (get(this, 'length')===0) return undefined ;

    // handle generic enumerables
    var context = popCtx(), ret;
    ret = this.nextObject(0, null, context);
    pushCtx(context);
    return ret ;
  }).property('[]').cacheable(),

  /**
    Helper method returns the last object from a collection. If your enumerable
    contains only one object, this method should always return that object.
    If your enumerable is empty, this method should return undefined.

        var arr = ["a", "b", "c"];
        arr.lastObject(); => "c"

        var arr = [];
        arr.lastObject(); => undefined

    @returns {Object} the last object or undefined
  */
  lastObject: Ember.computed(function() {
    var len = get(this, 'length');
    if (len===0) return undefined ;
    var context = popCtx(), idx=0, cur, last = null;
    do {
      last = cur;
      cur = this.nextObject(idx++, last, context);
    } while (cur !== undefined);
    pushCtx(context);
    return last;
  }).property('[]').cacheable(),

  /**
    Returns true if the passed object can be found in the receiver.  The
    default version will iterate through the enumerable until the object
    is found.  You may want to override this with a more efficient version.

        var arr = ["a", "b", "c"];
        arr.contains("a"); => true
        arr.contains("z"); => false

    @param {Object} obj
      The object to search for.

    @returns {Boolean} true if object is found in enumerable.
  */
  contains: function(obj) {
    return this.find(function(item) { return item===obj; }) !== undefined;
  },

  /**
    Iterates through the enumerable, calling the passed function on each
    item. This method corresponds to the forEach() method defined in
    JavaScript 1.6.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    @param {Function} callback The callback to execute
    @param {Object} target The target object to use
    @returns {Object} receiver
  */
  forEach: function(callback, target) {
    if (typeof callback !== "function") throw new TypeError() ;
    var len = get(this, 'length'), last = null, context = popCtx();

    if (target === undefined) target = null;

    for(var idx=0;idx<len;idx++) {
      var next = this.nextObject(idx, last, context) ;
      callback.call(target, next, idx, this);
      last = next ;
    }
    last = null ;
    context = pushCtx(context);
    return this ;
  },

  /**
    Alias for mapProperty

    @params key {String} name of the property
    @returns {Array} The mapped array.
  */
  getEach: function(key) {
    return this.mapProperty(key);
  },

  /**
    Sets the value on the named property for each member. This is more
    efficient than using other methods defined on this helper. If the object
    implements Ember.Observable, the value will be changed to set(), otherwise
    it will be set directly. null objects are skipped.

    @param {String} key The key to set
    @param {Object} value The object to set
    @returns {Object} receiver
  */
  setEach: function(key, value) {
    return this.forEach(function(item) {
      set(item, key, value);
    });
  },

  /**
    Maps all of the items in the enumeration to another value, returning
    a new array. This method corresponds to map() defined in JavaScript 1.6.

    The callback method you provide should have the following signature (all
    parameters are optional):

        function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    It should return the mapped value.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    @param {Function} callback The callback to execute
    @param {Object} target The target object to use
    @returns {Array} The mapped array.
  */
  map: function(callback, target) {
    var ret = [];
    this.forEach(function(x, idx, i) {
      ret[idx] = callback.call(target, x, idx,i);
    });
    return ret ;
  },

  /**
    Similar to map, this specialized function returns the value of the named
    property on all items in the enumeration.

    @params key {String} name of the property
    @returns {Array} The mapped array.
  */
  mapProperty: function(key) {
    return this.map(function(next) {
      return get(next, key);
    });
  },

  /**
    Returns an array with all of the items in the enumeration that the passed
    function returns true for. This method corresponds to filter() defined in
    JavaScript 1.6.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    It should return the true to include the item in the results, false otherwise.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    @param {Function} callback The callback to execute
    @param {Object} target The target object to use
    @returns {Array} A filtered array.
  */
  filter: function(callback, target) {
    var ret = [];
    this.forEach(function(x, idx, i) {
      if (callback.call(target, x, idx, i)) ret.push(x);
    });
    return ret ;
  },

  /**
    Returns an array with just the items with the matched property.  You
    can pass an optional second argument with the target value.  Otherwise
    this will match any property that evaluates to true.

    @params key {String} the property to test
    @param value {String} optional value to test against.
    @returns {Array} filtered array
  */
  filterProperty: function(key, value) {
    return this.filter(iter.apply(this, arguments));
  },

  /**
    Returns the first item in the array for which the callback returns true.
    This method works similar to the filter() method defined in JavaScript 1.6
    except that it will stop working on the array once a match is found.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    It should return the true to include the item in the results, false otherwise.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    @param {Function} callback The callback to execute
    @param {Object} target The target object to use
    @returns {Object} Found item or null.
  */
  find: function(callback, target) {
    var len = get(this, 'length') ;
    if (target === undefined) target = null;

    var last = null, next, found = false, ret ;
    var context = popCtx();
    for(var idx=0;idx<len && !found;idx++) {
      next = this.nextObject(idx, last, context) ;
      if (found = callback.call(target, next, idx, this)) ret = next ;
      last = next ;
    }
    next = last = null ;
    context = pushCtx(context);
    return ret ;
  },

  /**
    Returns an the first item with a property matching the passed value.  You
    can pass an optional second argument with the target value.  Otherwise
    this will match any property that evaluates to true.

    This method works much like the more generic find() method.

    @params key {String} the property to test
    @param value {String} optional value to test against.
    @returns {Object} found item or null
  */
  findProperty: function(key, value) {
    return this.find(iter.apply(this, arguments));
  },

  /**
    Returns true if the passed function returns true for every item in the
    enumeration. This corresponds with the every() method in JavaScript 1.6.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    It should return the true or false.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    Example Usage:

          if (people.every(isEngineer)) { Paychecks.addBigBonus(); }

    @param {Function} callback The callback to execute
    @param {Object} target The target object to use
    @returns {Boolean}
  */
  every: function(callback, target) {
    return !this.find(function(x, idx, i) {
      return !callback.call(target, x, idx, i);
    });
  },

  /**
    Returns true if the passed property resolves to true for all items in the
    enumerable.  This method is often simpler/faster than using a callback.

    @params key {String} the property to test
    @param value {String} optional value to test against.
    @returns {Array} filtered array
  */
  everyProperty: function(key, value) {
    return this.every(iter.apply(this, arguments));
  },


  /**
    Returns true if the passed function returns true for any item in the
    enumeration. This corresponds with the every() method in JavaScript 1.6.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(item, index, enumerable);

    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    It should return the true to include the item in the results, false otherwise.

    Note that in addition to a callback, you can also pass an optional target
    object that will be set as "this" on the context. This is a good way
    to give your iterator function access to the current object.

    Usage Example:

          if (people.some(isManager)) { Paychecks.addBiggerBonus(); }

    @param {Function} callback The callback to execute
    @param {Object} target The target object to use
    @returns {Array} A filtered array.
  */
  some: function(callback, target) {
    return !!this.find(function(x, idx, i) {
      return !!callback.call(target, x, idx, i);
    });
  },

  /**
    Returns true if the passed property resolves to true for any item in the
    enumerable.  This method is often simpler/faster than using a callback.

    @params key {String} the property to test
    @param value {String} optional value to test against.
    @returns {Boolean} true
  */
  someProperty: function(key, value) {
    return this.some(iter.apply(this, arguments));
  },

  /**
    This will combine the values of the enumerator into a single value. It
    is a useful way to collect a summary value from an enumeration. This
    corresponds to the reduce() method defined in JavaScript 1.8.

    The callback method you provide should have the following signature (all
    parameters are optional):

          function(previousValue, item, index, enumerable);

    - *previousValue* is the value returned by the last call to the iterator.
    - *item* is the current item in the iteration.
    - *index* is the current index in the iteration
    - *enumerable* is the enumerable object itself.

    Return the new cumulative value.

    In addition to the callback you can also pass an initialValue. An error
    will be raised if you do not pass an initial value and the enumerator is
    empty.

    Note that unlike the other methods, this method does not allow you to
    pass a target object to set as this for the callback. It's part of the
    spec. Sorry.

    @param {Function} callback The callback to execute
    @param {Object} initialValue Initial value for the reduce
    @param {String} reducerProperty internal use only.
    @returns {Object} The reduced value.
  */
  reduce: function(callback, initialValue, reducerProperty) {
    if (typeof callback !== "function") { throw new TypeError(); }

    var ret = initialValue;

    this.forEach(function(item, i) {
      ret = callback.call(null, ret, item, i, this, reducerProperty);
    }, this);

    return ret;
  },

  /**
    Invokes the named method on every object in the receiver that
    implements it.  This method corresponds to the implementation in
    Prototype 1.6.

    @param methodName {String} the name of the method
    @param args {Object...} optional arguments to pass as well.
    @returns {Array} return values from calling invoke.
  */
  invoke: function(methodName) {
    var args, ret = [];
    if (arguments.length>1) args = a_slice.call(arguments, 1);

    this.forEach(function(x, idx) {
      var method = x && x[methodName];
      if ('function' === typeof method) {
        ret[idx] = args ? method.apply(x, args) : method.call(x);
      }
    }, this);

    return ret;
  },

  /**
    Simply converts the enumerable into a genuine array.  The order is not
    guaranteed.  Corresponds to the method implemented by Prototype.

    @returns {Array} the enumerable as an array.
  */
  toArray: function() {
    var ret = [];
    this.forEach(function(o, idx) { ret[idx] = o; });
    return ret ;
  },

  /**
    Returns a copy of the array with all null elements removed.
    
        var arr = ["a", null, "c", null];
        arr.compact(); => ["a", "c"] 

    @returns {Array} the array without null elements.
  */
  compact: function() { return this.without(null); },

  /**
    Returns a new enumerable that excludes the passed value.  The default
    implementation returns an array regardless of the receiver type unless
    the receiver does not contain the value.

        var arr = ["a", "b", "a", "c"];
        arr.without("a"); => ["b", "c"]

    @param {Object} value
    @returns {Ember.Enumerable}
  */
  without: function(value) {
    if (!this.contains(value)) return this; // nothing to do
    var ret = [] ;
    this.forEach(function(k) {
      if (k !== value) ret[ret.length] = k;
    }) ;
    return ret ;
  },

  /**
    Returns a new enumerable that contains only unique values.  The default
    implementation returns an array regardless of the receiver type.

        var arr = ["a", "a", "b", "b"];
        arr.uniq(); => ["a", "b"]

    @returns {Ember.Enumerable}
  */
  uniq: function() {
    var ret = [];
    this.forEach(function(k){
      if (a_indexOf(ret, k)<0) ret.push(k);
    });
    return ret;
  },

  /**
    This property will trigger anytime the enumerable's content changes.
    You can observe this property to be notified of changes to the enumerables
    content.

    For plain enumerables, this property is read only.  Ember.Array overrides
    this method.

    @property {Ember.Array}
  */
  '[]': Ember.computed(function(key, value) {
    return this;
  }).property().cacheable(),

  // ..........................................................
  // ENUMERABLE OBSERVERS
  //

  /**
    Registers an enumerable observer.   Must implement Ember.EnumerableObserver
    mixin.
  */
  addEnumerableObserver: function(target, opts) {
    var willChange = (opts && opts.willChange) || 'enumerableWillChange',
        didChange  = (opts && opts.didChange) || 'enumerableDidChange';

    var hasObservers = get(this, 'hasEnumerableObservers');
    if (!hasObservers) Ember.propertyWillChange(this, 'hasEnumerableObservers');
    Ember.addListener(this, '@enumerable:before', target, willChange, xform);
    Ember.addListener(this, '@enumerable:change', target, didChange, xform);
    if (!hasObservers) Ember.propertyDidChange(this, 'hasEnumerableObservers');
    return this;
  },

  /**
    Removes a registered enumerable observer.
  */
  removeEnumerableObserver: function(target, opts) {
    var willChange = (opts && opts.willChange) || 'enumerableWillChange',
        didChange  = (opts && opts.didChange) || 'enumerableDidChange';

    var hasObservers = get(this, 'hasEnumerableObservers');
    if (hasObservers) Ember.propertyWillChange(this, 'hasEnumerableObservers');
    Ember.removeListener(this, '@enumerable:before', target, willChange);
    Ember.removeListener(this, '@enumerable:change', target, didChange);
    if (hasObservers) Ember.propertyDidChange(this, 'hasEnumerableObservers');
    return this;
  },

  /**
    Becomes true whenever the array currently has observers watching changes
    on the array.

    @property {Boolean}
  */
  hasEnumerableObservers: Ember.computed(function() {
    return Ember.hasListeners(this, '@enumerable:change') || Ember.hasListeners(this, '@enumerable:before');
  }).property().cacheable(),


  /**
    Invoke this method just before the contents of your enumerable will
    change.  You can either omit the parameters completely or pass the objects
    to be removed or added if available or just a count.

    @param {Ember.Enumerable|Number} removing
      An enumerable of the objects to be removed or the number of items to
      be removed.

    @param {Ember.Enumerable|Number} adding
      An enumerable of the objects to be added or the number of items to be
      added.

    @returns {Ember.Enumerable} receiver
  */
  enumerableContentWillChange: function(removing, adding) {

    var removeCnt, addCnt, hasDelta;

    if ('number' === typeof removing) removeCnt = removing;
    else if (removing) removeCnt = get(removing, 'length');
    else removeCnt = removing = -1;

    if ('number' === typeof adding) addCnt = adding;
    else if (adding) addCnt = get(adding,'length');
    else addCnt = adding = -1;

    hasDelta = addCnt<0 || removeCnt<0 || addCnt-removeCnt!==0;

    if (removing === -1) removing = null;
    if (adding   === -1) adding   = null;

    Ember.propertyWillChange(this, '[]');
    if (hasDelta) Ember.propertyWillChange(this, 'length');
    Ember.sendEvent(this, '@enumerable:before', removing, adding);

    return this;
  },

  /**
    Invoke this method when the contents of your enumerable has changed.
    This will notify any observers watching for content changes.  If your are
    implementing an ordered enumerable (such as an array), also pass the
    start and end values where the content changed so that it can be used to
    notify range observers.

    @param {Number} start
      optional start offset for the content change.  For unordered
      enumerables, you should always pass -1.

    @param {Ember.Enumerable|Number} removing
      An enumerable of the objects to be removed or the number of items to
      be removed.

    @param {Ember.Enumerable|Numbe} adding
      An enumerable of the objects to be added or the number of items to be
      added.

    @returns {Object} receiver
  */
  enumerableContentDidChange: function(removing, adding) {
    var notify = this.propertyDidChange, removeCnt, addCnt, hasDelta;

    if ('number' === typeof removing) removeCnt = removing;
    else if (removing) removeCnt = get(removing, 'length');
    else removeCnt = removing = -1;

    if ('number' === typeof adding) addCnt = adding;
    else if (adding) addCnt = get(adding, 'length');
    else addCnt = adding = -1;

    hasDelta = addCnt<0 || removeCnt<0 || addCnt-removeCnt!==0;

    if (removing === -1) removing = null;
    if (adding   === -1) adding   = null;

    Ember.sendEvent(this, '@enumerable:change', removing, adding);
    if (hasDelta) Ember.propertyDidChange(this, 'length');
    Ember.propertyDidChange(this, '[]');

    return this ;
  }

}) ;




})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
// ..........................................................
// HELPERS
//

var get = Ember.get, set = Ember.set, meta = Ember.meta, map = Ember.ArrayUtils.map, cacheFor = Ember.cacheFor;

/** @private */
function none(obj) { return obj===null || obj===undefined; }

/** @private */
function xform(target, method, params) {
  method.call(target, params[0], params[2], params[3], params[4]);
}

// ..........................................................
// ARRAY
//
/**
  @namespace

  This module implements Observer-friendly Array-like behavior.  This mixin is
  picked up by the Array class as well as other controllers, etc. that want to
  appear to be arrays.

  Unlike Ember.Enumerable, this mixin defines methods specifically for
  collections that provide index-ordered access to their contents.  When you
  are designing code that needs to accept any kind of Array-like object, you
  should use these methods instead of Array primitives because these will
  properly notify observers of changes to the array.

  Although these methods are efficient, they do add a layer of indirection to
  your application so it is a good idea to use them only when you need the
  flexibility of using both true JavaScript arrays and "virtual" arrays such
  as controllers and collections.

  You can use the methods defined in this module to access and modify array
  contents in a KVO-friendly way.  You can also be notified whenever the
  membership if an array changes by changing the syntax of the property to
  .observes('*myProperty.[]') .

  To support Ember.Array in your own class, you must override two
  primitives to use it: replace() and objectAt().

  Note that the Ember.Array mixin also incorporates the Ember.Enumerable mixin.  All
  Ember.Array-like objects are also enumerable.

  @extends Ember.Enumerable
  @since Ember 0.9.0
*/
Ember.Array = Ember.Mixin.create(Ember.Enumerable, /** @scope Ember.Array.prototype */ {

  /** @private - compatibility */
  isSCArray: true,

  /**
    @field {Number} length

    Your array must support the length property.  Your replace methods should
    set this property whenever it changes.
  */
  length: Ember.required(),

  /**
    This is one of the primitives you must implement to support Ember.Array.
    Returns the object at the named index.  If your object supports retrieving
    the value of an array item using get() (i.e. myArray.get(0)), then you do
    not need to implement this method yourself.

    @param {Number} idx
      The index of the item to return.  If idx exceeds the current length,
      return null.
  */
  objectAt: function(idx) {
    if ((idx < 0) || (idx>=get(this, 'length'))) return undefined ;
    return get(this, idx);
  },

  /**
    This returns the objects at the specified indexes, using objectAt.

    @param {Array} indexes
      An array of indexes of items to return.
   */
  objectsAt: function(indexes) {
    var self = this;
    return map(indexes, function(idx){ return self.objectAt(idx); });
  },

  /** @private (nodoc) - overrides Ember.Enumerable version */
  nextObject: function(idx) {
    return this.objectAt(idx);
  },

  /**
    @field []

    This is the handler for the special array content property.  If you get
    this property, it will return this.  If you set this property it a new
    array, it will replace the current content.

    This property overrides the default property defined in Ember.Enumerable.
  */
  '[]': Ember.computed(function(key, value) {
    if (value !== undefined) this.replace(0, get(this, 'length'), value) ;
    return this ;
  }).property().cacheable(),

  firstObject: Ember.computed(function() {
    return this.objectAt(0);
  }).property().cacheable(),

  lastObject: Ember.computed(function() {
    return this.objectAt(get(this, 'length')-1);
  }).property().cacheable(),

  /** @private (nodoc) - optimized version from Enumerable */
  contains: function(obj){
    return this.indexOf(obj) >= 0;
  },

  // Add any extra methods to Ember.Array that are native to the built-in Array.
  /**
    Returns a new array that is a slice of the receiver.  This implementation
    uses the observable array methods to retrieve the objects for the new
    slice.

        var arr = ['red', 'green', 'blue'];
        arr.slice(0);      => ['red', 'green', 'blue']
        arr.slice(0, 2);   => ['red', 'green']
        arr.slice(1, 100); => ['green', 'blue']

    @param beginIndex {Integer} (Optional) index to begin slicing from.
    @param endIndex {Integer} (Optional) index to end the slice at.
    @returns {Array} New array with specified slice
  */
  slice: function(beginIndex, endIndex) {
    var ret = [];
    var length = get(this, 'length') ;
    if (none(beginIndex)) beginIndex = 0 ;
    if (none(endIndex) || (endIndex > length)) endIndex = length ;
    while(beginIndex < endIndex) {
      ret[ret.length] = this.objectAt(beginIndex++) ;
    }
    return ret ;
  },

  /**
    Returns the index of the given object's first occurrence.
    If no startAt argument is given, the starting location to
    search is 0. If it's negative, will count backward from
    the end of the array. Returns -1 if no match is found.

        var arr = ["a", "b", "c", "d", "a"];
        arr.indexOf("a");      =>  0
        arr.indexOf("z");      => -1
        arr.indexOf("a", 2);   =>  4
        arr.indexOf("a", -1);  =>  4
        arr.indexOf("b", 3);   => -1
        arr.indexOf("a", 100); => -1

    @param {Object} object the item to search for
    @param {Number} startAt optional starting location to search, default 0
    @returns {Number} index or -1 if not found
  */
  indexOf: function(object, startAt) {
    var idx, len = get(this, 'length');

    if (startAt === undefined) startAt = 0;
    if (startAt < 0) startAt += len;

    for(idx=startAt;idx<len;idx++) {
      if (this.objectAt(idx, true) === object) return idx ;
    }
    return -1;
  },

  /**
    Returns the index of the given object's last occurrence.
    If no startAt argument is given, the search starts from
    the last position. If it's negative, will count backward
    from the end of the array. Returns -1 if no match is found.

        var arr = ["a", "b", "c", "d", "a"];
        arr.lastIndexOf("a");      =>  4
        arr.lastIndexOf("z");      => -1
        arr.lastIndexOf("a", 2);   =>  0
        arr.lastIndexOf("a", -1);  =>  4
        arr.lastIndexOf("b", 3);   =>  1
        arr.lastIndexOf("a", 100); =>  4

    @param {Object} object the item to search for
    @param {Number} startAt optional starting location to search, default 0
    @returns {Number} index or -1 if not found
  */
  lastIndexOf: function(object, startAt) {
    var idx, len = get(this, 'length');

    if (startAt === undefined || startAt >= len) startAt = len-1;
    if (startAt < 0) startAt += len;

    for(idx=startAt;idx>=0;idx--) {
      if (this.objectAt(idx) === object) return idx ;
    }
    return -1;
  },

  // ..........................................................
  // ARRAY OBSERVERS
  //

  /**
    Adds an array observer to the receiving array.  The array observer object
    normally must implement two methods:

    * `arrayWillChange(start, removeCount, addCount)` - This method will be
      called just before the array is modified.
    * `arrayDidChange(start, removeCount, addCount)` - This method will be
      called just after the array is modified.

    Both callbacks will be passed the starting index of the change as well a
    a count of the items to be removed and added.  You can use these callbacks
    to optionally inspect the array during the change, clear caches, or do
    any other bookkeeping necessary.

    In addition to passing a target, you can also include an options hash
    which you can use to override the method names that will be invoked on the
    target.

    @param {Object} target
      The observer object.

    @param {Hash} opts
      Optional hash of configuration options including willChange, didChange,
      and a context option.

    @returns {Ember.Array} receiver
  */
  addArrayObserver: function(target, opts) {
    var willChange = (opts && opts.willChange) || 'arrayWillChange',
        didChange  = (opts && opts.didChange) || 'arrayDidChange';

    var hasObservers = get(this, 'hasArrayObservers');
    if (!hasObservers) Ember.propertyWillChange(this, 'hasArrayObservers');
    Ember.addListener(this, '@array:before', target, willChange, xform);
    Ember.addListener(this, '@array:change', target, didChange, xform);
    if (!hasObservers) Ember.propertyDidChange(this, 'hasArrayObservers');
    return this;
  },

  /**
    Removes an array observer from the object if the observer is current
    registered.  Calling this method multiple times with the same object will
    have no effect.

    @param {Object} target
      The object observing the array.

    @returns {Ember.Array} receiver
  */
  removeArrayObserver: function(target, opts) {
    var willChange = (opts && opts.willChange) || 'arrayWillChange',
        didChange  = (opts && opts.didChange) || 'arrayDidChange';

    var hasObservers = get(this, 'hasArrayObservers');
    if (hasObservers) Ember.propertyWillChange(this, 'hasArrayObservers');
    Ember.removeListener(this, '@array:before', target, willChange, xform);
    Ember.removeListener(this, '@array:change', target, didChange, xform);
    if (hasObservers) Ember.propertyDidChange(this, 'hasArrayObservers');
    return this;
  },

  /**
    Becomes true whenever the array currently has observers watching changes
    on the array.

    @property {Boolean}
  */
  hasArrayObservers: Ember.computed(function() {
    return Ember.hasListeners(this, '@array:change') || Ember.hasListeners(this, '@array:before');
  }).property().cacheable(),

  /**
    If you are implementing an object that supports Ember.Array, call this
    method just before the array content changes to notify any observers and
    invalidate any related properties.  Pass the starting index of the change
    as well as a delta of the amounts to change.

    @param {Number} startIdx
      The starting index in the array that will change.

    @param {Number} removeAmt
      The number of items that will be removed.  If you pass null assumes 0

    @param {Number} addAmt
      The number of items that will be added.  If you pass null assumes 0.

    @returns {Ember.Array} receiver
  */
  arrayContentWillChange: function(startIdx, removeAmt, addAmt) {

    // if no args are passed assume everything changes
    if (startIdx===undefined) {
      startIdx = 0;
      removeAmt = addAmt = -1;
    } else {
      if (removeAmt === undefined) removeAmt=-1;
      if (addAmt    === undefined) addAmt=-1;
    }

    Ember.sendEvent(this, '@array:before', startIdx, removeAmt, addAmt);

    var removing, lim;
    if (startIdx>=0 && removeAmt>=0 && get(this, 'hasEnumerableObservers')) {
      removing = [];
      lim = startIdx+removeAmt;
      for(var idx=startIdx;idx<lim;idx++) removing.push(this.objectAt(idx));
    } else {
      removing = removeAmt;
    }

    this.enumerableContentWillChange(removing, addAmt);

    // Make sure the @each proxy is set up if anyone is observing @each
    if (Ember.isWatching(this, '@each')) { get(this, '@each'); }

    return this;
  },

  arrayContentDidChange: function(startIdx, removeAmt, addAmt) {

    // if no args are passed assume everything changes
    if (startIdx===undefined) {
      startIdx = 0;
      removeAmt = addAmt = -1;
    } else {
      if (removeAmt === undefined) removeAmt=-1;
      if (addAmt    === undefined) addAmt=-1;
    }

    var adding, lim;
    if (startIdx>=0 && addAmt>=0 && get(this, 'hasEnumerableObservers')) {
      adding = [];
      lim = startIdx+addAmt;
      for(var idx=startIdx;idx<lim;idx++) adding.push(this.objectAt(idx));
    } else {
      adding = addAmt;
    }

    this.enumerableContentDidChange(removeAmt, adding);
    Ember.sendEvent(this, '@array:change', startIdx, removeAmt, addAmt);

    var length      = get(this, 'length'),
        cachedFirst = cacheFor(this, 'firstObject'),
        cachedLast  = cacheFor(this, 'lastObject');
    if (this.objectAt(0) !== cachedFirst) {
      Ember.propertyWillChange(this, 'firstObject');
      Ember.propertyDidChange(this, 'firstObject');
    }
    if (this.objectAt(length-1) !== cachedLast) {
      Ember.propertyWillChange(this, 'lastObject');
      Ember.propertyDidChange(this, 'lastObject');
    }

    return this;
  },

  // ..........................................................
  // ENUMERATED PROPERTIES
  //

  /**
    Returns a special object that can be used to observe individual properties
    on the array.  Just get an equivalent property on this object and it will
    return an enumerable that maps automatically to the named key on the
    member objects.
  */
  '@each': Ember.computed(function() {
    if (!this.__each) this.__each = new Ember.EachProxy(this);
    return this.__each;
  }).property().cacheable()



}) ;




})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2006-2011 Strobe Inc. and contributors.
//            Portions ©2008-2011 Apple Inc. All rights reserved.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
/**
  @namespace

  Implements some standard methods for comparing objects. Add this mixin to
  any class you create that can compare its instances.

  You should implement the compare() method.

  @since Ember 0.9
*/
Ember.Comparable = Ember.Mixin.create( /** @scope Ember.Comparable.prototype */{

  /**
    walk like a duck. Indicates that the object can be compared.

    @type Boolean
    @default true
    @constant
  */
  isComparable: true,

  /**
    Override to return the result of the comparison of the two parameters. The
    compare method should return:

      - `-1` if `a < b`
      - `0` if `a == b`
      - `1` if `a > b`

    Default implementation raises an exception.

    @param a {Object} the first object to compare
    @param b {Object} the second object to compare
    @returns {Integer} the result of the comparison
  */
  compare: Ember.required(Function)

});


})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2006-2011 Strobe Inc. and contributors.
//            Portions ©2008-2010 Apple Inc. All rights reserved.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var get = Ember.get, set = Ember.set;

/**
  @namespace

  Implements some standard methods for copying an object.  Add this mixin to
  any object you create that can create a copy of itself.  This mixin is
  added automatically to the built-in array.

  You should generally implement the copy() method to return a copy of the
  receiver.

  Note that frozenCopy() will only work if you also implement Ember.Freezable.

  @since Ember 0.9
*/
Ember.Copyable = Ember.Mixin.create(
/** @scope Ember.Copyable.prototype */ {

  /**
    Override to return a copy of the receiver.  Default implementation raises
    an exception.

    @param deep {Boolean} if true, a deep copy of the object should be made
    @returns {Object} copy of receiver
  */
  copy: Ember.required(Function),

  /**
    If the object implements Ember.Freezable, then this will return a new copy
    if the object is not frozen and the receiver if the object is frozen.

    Raises an exception if you try to call this method on a object that does
    not support freezing.

    You should use this method whenever you want a copy of a freezable object
    since a freezable object can simply return itself without actually
    consuming more memory.

    @returns {Object} copy of receiver or receiver
  */
  frozenCopy: function() {
    if (Ember.Freezable && Ember.Freezable.detect(this)) {
      return get(this, 'isFrozen') ? this : this.copy().freeze();
    } else {
      throw new Error(Ember.String.fmt("%@ does not support freezing", [this]));
    }
  }
});




})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2006-2011 Strobe Inc. and contributors.
//            Portions ©2008-2010 Apple Inc. All rights reserved.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================





var get = Ember.get, set = Ember.set;

/**
  @namespace

  The Ember.Freezable mixin implements some basic methods for marking an object
  as frozen. Once an object is frozen it should be read only. No changes
  may be made the internal state of the object.

  ## Enforcement

  To fully support freezing in your subclass, you must include this mixin and
  override any method that might alter any property on the object to instead
  raise an exception. You can check the state of an object by checking the
  isFrozen property.

  Although future versions of JavaScript may support language-level freezing
  object objects, that is not the case today. Even if an object is freezable,
  it is still technically possible to modify the object, even though it could
  break other parts of your application that do not expect a frozen object to
  change. It is, therefore, very important that you always respect the
  isFrozen property on all freezable objects.

  ## Example Usage

  The example below shows a simple object that implement the Ember.Freezable
  protocol.

        Contact = Ember.Object.extend(Ember.Freezable, {

          firstName: null,

          lastName: null,

          // swaps the names
          swapNames: function() {
            if (this.get('isFrozen')) throw Ember.FROZEN_ERROR;
            var tmp = this.get('firstName');
            this.set('firstName', this.get('lastName'));
            this.set('lastName', tmp);
            return this;
          }

        });

        c = Context.create({ firstName: "John", lastName: "Doe" });
        c.swapNames();  => returns c
        c.freeze();
        c.swapNames();  => EXCEPTION

  ## Copying

  Usually the Ember.Freezable protocol is implemented in cooperation with the
  Ember.Copyable protocol, which defines a frozenCopy() method that will return
  a frozen object, if the object implements this method as well.

  @since Ember 0.9
*/
Ember.Freezable = Ember.Mixin.create(
/** @scope Ember.Freezable.prototype */ {

  /**
    Set to true when the object is frozen.  Use this property to detect whether
    your object is frozen or not.

    @property {Boolean}
  */
  isFrozen: false,

  /**
    Freezes the object.  Once this method has been called the object should
    no longer allow any properties to be edited.

    @returns {Object} receiver
  */
  freeze: function() {
    if (get(this, 'isFrozen')) return this;
    set(this, 'isFrozen', true);
    return this;
  }

});

Ember.FROZEN_ERROR = "Frozen object cannot be modified.";




})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var forEach = Ember.ArrayUtils.forEach;

/**
  @class

  This mixin defines the API for modifying generic enumerables.  These methods
  can be applied to an object regardless of whether it is ordered or
  unordered.

  Note that an Enumerable can change even if it does not implement this mixin.
  For example, a MappedEnumerable cannot be directly modified but if its
  underlying enumerable changes, it will change also.

  ## Adding Objects

  To add an object to an enumerable, use the addObject() method.  This
  method will only add the object to the enumerable if the object is not
  already present and the object if of a type supported by the enumerable.

      set.addObject(contact);

  ## Removing Objects

  To remove an object form an enumerable, use the removeObject() method.  This
  will only remove the object if it is already in the enumerable, otherwise
  this method has no effect.

      set.removeObject(contact);

  ## Implementing In Your Own Code

  If you are implementing an object and want to support this API, just include
  this mixin in your class and implement the required methods.  In your unit
  tests, be sure to apply the Ember.MutableEnumerableTests to your object.

  @extends Ember.Mixin
  @extends Ember.Enumerable
*/
Ember.MutableEnumerable = Ember.Mixin.create(Ember.Enumerable,
  /** @scope Ember.MutableEnumerable.prototype */ {

  /**
    __Required.__ You must implement this method to apply this mixin.

    Attempts to add the passed object to the receiver if the object is not
    already present in the collection. If the object is present, this method
    has no effect.

    If the passed object is of a type not supported by the receiver
    then this method should raise an exception.

    @param {Object} object
      The object to add to the enumerable.

    @returns {Object} the passed object
  */
  addObject: Ember.required(Function),

  /**
    Adds each object in the passed enumerable to the receiver.

    @param {Ember.Enumerable} objects the objects to add.
    @returns {Object} receiver
  */
  addObjects: function(objects) {
    Ember.beginPropertyChanges(this);
    forEach(objects, function(obj) { this.addObject(obj); }, this);
    Ember.endPropertyChanges(this);
    return this;
  },

  /**
    __Required.__ You must implement this method to apply this mixin.

    Attempts to remove the passed object from the receiver collection if the
    object is in present in the collection.  If the object is not present,
    this method has no effect.

    If the passed object is of a type not supported by the receiver
    then this method should raise an exception.

    @param {Object} object
      The object to remove from the enumerable.

    @returns {Object} the passed object
  */
  removeObject: Ember.required(Function),


  /**
    Removes each objects in the passed enumerable from the receiver.

    @param {Ember.Enumerable} objects the objects to remove
    @returns {Object} receiver
  */
  removeObjects: function(objects) {
    Ember.beginPropertyChanges(this);
    forEach(objects, function(obj) { this.removeObject(obj); }, this);
    Ember.endPropertyChanges(this);
    return this;
  }

});

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
// ..........................................................
// CONSTANTS
//

var OUT_OF_RANGE_EXCEPTION = "Index out of range" ;
var EMPTY = [];

// ..........................................................
// HELPERS
//

var get = Ember.get, set = Ember.set, forEach = Ember.ArrayUtils.forEach;

/**
  @class

  This mixin defines the API for modifying array-like objects.  These methods
  can be applied only to a collection that keeps its items in an ordered set.

  Note that an Array can change even if it does not implement this mixin.
  For example, one might implement a SparseArray that cannot be directly
  modified, but if its underlying enumerable changes, it will change also.

  @extends Ember.Mixin
  @extends Ember.Array
  @extends Ember.MutableEnumerable
*/
Ember.MutableArray = Ember.Mixin.create(Ember.Array, Ember.MutableEnumerable,
  /** @scope Ember.MutableArray.prototype */ {

  /**
    __Required.__ You must implement this method to apply this mixin.

    This is one of the primitives you must implement to support Ember.Array.  You
    should replace amt objects started at idx with the objects in the passed
    array.  You should also call this.enumerableContentDidChange() ;

    @param {Number} idx
      Starting index in the array to replace.  If idx >= length, then append
      to the end of the array.

    @param {Number} amt
      Number of elements that should be removed from the array, starting at
      *idx*.

    @param {Array} objects
      An array of zero or more objects that should be inserted into the array
      at *idx*
  */
  replace: Ember.required(),

  /**
    Remove all elements from self. This is useful if you
    want to reuse an existing array without having to recreate it.

        var colors = ["red", "green", "blue"];
        color.length();  => 3
        colors.clear();  => []
        colors.length(); => 0

    @returns {Ember.Array} An empty Array. 
  */
  clear: function () {
    var len = get(this, 'length');
    if (len === 0) return this;
    this.replace(0, len, EMPTY);
    return this;
  },

  /**
    This will use the primitive replace() method to insert an object at the
    specified index.

        var colors = ["red", "green", "blue"];
        colors.insertAt(2, "yellow"); => ["red", "green", "yellow", "blue"]
        colors.insertAt(5, "orange"); => Error: Index out of range

    @param {Number} idx index of insert the object at.
    @param {Object} object object to insert
  */
  insertAt: function(idx, object) {
    if (idx > get(this, 'length')) throw new Error(OUT_OF_RANGE_EXCEPTION) ;
    this.replace(idx, 0, [object]) ;
    return this ;
  },

  /**
    Remove an object at the specified index using the replace() primitive
    method.  You can pass either a single index, or a start and a length.

    If you pass a start and length that is beyond the
    length this method will throw an Ember.OUT_OF_RANGE_EXCEPTION

        var colors = ["red", "green", "blue", "yellow", "orange"];
        colors.removeAt(0); => ["green", "blue", "yellow", "orange"]
        colors.removeAt(2, 2); => ["green", "blue"]
        colors.removeAt(4, 2); => Error: Index out of range

    @param {Number} start index, start of range
    @param {Number} len length of passing range
    @returns {Object} receiver
  */
  removeAt: function(start, len) {

    var delta = 0;

    if ('number' === typeof start) {

      if ((start < 0) || (start >= get(this, 'length'))) {
        throw new Error(OUT_OF_RANGE_EXCEPTION);
      }

      // fast case
      if (len === undefined) len = 1;
      this.replace(start, len, EMPTY);
    }

    return this ;
  },

  /**
    Push the object onto the end of the array.  Works just like push() but it
    is KVO-compliant.

        var colors = ["red", "green", "blue"];
        colors.pushObject("black"); => ["red", "green", "blue", "black"]
        colors.pushObject(["yellow", "orange"]); => ["red", "green", "blue", "black", ["yellow", "orange"]]

  */
  pushObject: function(obj) {
    this.insertAt(get(this, 'length'), obj) ;
    return obj ;
  },

  /**
    Add the objects in the passed numerable to the end of the array.  Defers
    notifying observers of the change until all objects are added.

        var colors = ["red", "green", "blue"];
        colors.pushObjects("black"); => ["red", "green", "blue", "black"]
        colors.pushObjects(["yellow", "orange"]); => ["red", "green", "blue", "black", "yellow", "orange"]

    @param {Ember.Enumerable} objects the objects to add
    @returns {Ember.Array} receiver
  */
  pushObjects: function(objects) {
    this.replace(get(this, 'length'), 0, objects);
    return this;
  },

  /**
    Pop object from array or nil if none are left.  Works just like pop() but
    it is KVO-compliant.

        var colors = ["red", "green", "blue"];
        colors.popObject(); => "blue"
        console.log(colors); => ["red", "green"]

  */
  popObject: function() {
    var len = get(this, 'length') ;
    if (len === 0) return null ;

    var ret = this.objectAt(len-1) ;
    this.removeAt(len-1, 1) ;
    return ret ;
  },

  /**
    Shift an object from start of array or nil if none are left.  Works just
    like shift() but it is KVO-compliant.

        var colors = ["red", "green", "blue"];
        colors.shiftObject(); => "red"
        console.log(colors); => ["green", "blue"]

  */
  shiftObject: function() {
    if (get(this, 'length') === 0) return null ;
    var ret = this.objectAt(0) ;
    this.removeAt(0) ;
    return ret ;
  },

  /**
    Unshift an object to start of array.  Works just like unshift() but it is
    KVO-compliant.

        var colors = ["red", "green", "blue"];
        colors.unshiftObject("yellow"); => ["yellow", "red", "green", "blue"]
        colors.unshiftObject(["black", "white"]); => [["black", "white"], "yellow", "red", "green", "blue"]

  */
  unshiftObject: function(obj) {
    this.insertAt(0, obj) ;
    return obj ;
  },

  /**
    Adds the named objects to the beginning of the array.  Defers notifying
    observers until all objects have been added.

        var colors = ["red", "green", "blue"];
        colors.unshiftObjects(["black", "white"]); => ["black", "white", "red", "green", "blue"]
        colors.unshiftObjects("yellow"); => Type Error: 'undefined' is not a function

    @param {Ember.Enumerable} objects the objects to add
    @returns {Ember.Array} receiver
  */
  unshiftObjects: function(objects) {
    this.replace(0, 0, objects);
    return this;
  },

  // ..........................................................
  // IMPLEMENT Ember.MutableEnumerable
  //

  /** @private (nodoc) */
  removeObject: function(obj) {
    var loc = get(this, 'length') || 0;
    while(--loc >= 0) {
      var curObject = this.objectAt(loc) ;
      if (curObject === obj) this.removeAt(loc) ;
    }
    return this ;
  },

  /** @private (nodoc) */
  addObject: function(obj) {
    if (!this.contains(obj)) this.pushObject(obj);
    return this ;
  }

});


})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================

var get = Ember.get, set = Ember.set;

/**
  @class

  ## Overview
  
  This mixin provides properties and property observing functionality, core
  features of the Ember object model.
  
  Properties and observers allow one object to observe changes to a
  property on another object. This is one of the fundamental ways that
  models, controllers and views communicate with each other in an Ember
  application.
  
  Any object that has this mixin applied can be used in observer
  operations. That includes Ember.Object and most objects you will
  interact with as you write your Ember application.

  Note that you will not generally apply this mixin to classes yourself,
  but you will use the features provided by this module frequently, so it
  is important to understand how to use it.
  
  ## Using get() and set()
  
  Because of Ember's support for bindings and observers, you will always
  access properties using the get method, and set properties using the
  set method. This allows the observing objects to be notified and
  computed properties to be handled properly.
  
  More documentation about `get` and `set` are below.
  
  ## Observing Property Changes

  You typically observe property changes simply by adding the `observes`
  call to the end of your method declarations in classes that you write.
  For example:

      Ember.Object.create({
        valueObserver: function() {
          // Executes whenever the "value" property changes
        }.observes('value')
      });
    
  Although this is the most common way to add an observer, this capability
  is actually built into the Ember.Object class on top of two methods
  defined in this mixin: `addObserver` and `removeObserver`. You can use
  these two methods to add and remove observers yourself if you need to
  do so at runtime.

  To add an observer for a property, call:

      object.addObserver('propertyKey', targetObject, targetAction)

  This will call the `targetAction` method on the `targetObject` to be called
  whenever the value of the `propertyKey` changes.
  
  Note that if `propertyKey` is a computed property, the observer will be 
  called when any of the property dependencies are changed, even if the 
  resulting value of the computed property is unchanged. This is necessary
  because computed properties are not computed until `get` is called.
  
  @extends Ember.Mixin
*/
Ember.Observable = Ember.Mixin.create(/** @scope Ember.Observable.prototype */ {

  /** @private - compatibility */
  isObserverable: true,

  /**
    Retrieves the value of a property from the object.

    This method is usually similar to using object[keyName] or object.keyName,
    however it supports both computed properties and the unknownProperty
    handler.
    
    Because `get` unifies the syntax for accessing all these kinds
    of properties, it can make many refactorings easier, such as replacing a
    simple property with a computed property, or vice versa.

    ### Computed Properties

    Computed properties are methods defined with the `property` modifier
    declared at the end, such as:

          fullName: function() {
            return this.getEach('firstName', 'lastName').compact().join(' ');
          }.property('firstName', 'lastName')

    When you call `get` on a computed property, the function will be
    called and the return value will be returned instead of the function
    itself.

    ### Unknown Properties

    Likewise, if you try to call `get` on a property whose value is
    undefined, the unknownProperty() method will be called on the object.
    If this method returns any value other than undefined, it will be returned
    instead. This allows you to implement "virtual" properties that are
    not defined upfront.

    @param {String} key The property to retrieve
    @returns {Object} The property value or undefined.
  */
  get: function(keyName) {
    return get(this, keyName);
  },

  /**
    To get multiple properties at once, call getProperties
    with a list of strings or an array:

          record.getProperties('firstName', 'lastName', 'zipCode'); // => { firstName: 'John', lastName: 'Doe', zipCode: '10011' }

   is equivalent to:

          record.getProperties(['firstName', 'lastName', 'zipCode']); // => { firstName: 'John', lastName: 'Doe', zipCode: '10011' }

    @param {String...|Array} list of keys to get
    @returns {Hash}
  */
  getProperties: function() {
    var ret = {};
    var propertyNames = arguments;
    if (arguments.length === 1 && Ember.typeOf(arguments[0]) === 'array') {
      propertyNames = arguments[0];
    }
    for(var i = 0; i < propertyNames.length; i++) {
      ret[propertyNames[i]] = get(this, propertyNames[i]);
    }
    return ret;
  },

  /**
    Sets the key equal to value.

    This method is generally very similar to calling object[key] = value or
    object.key = value, except that it provides support for computed
    properties, the unknownProperty() method and property observers.

    ### Computed Properties

    If you try to set a value on a key that has a computed property handler
    defined (see the get() method for an example), then set() will call
    that method, passing both the value and key instead of simply changing
    the value itself. This is useful for those times when you need to
    implement a property that is composed of one or more member
    properties.

    ### Unknown Properties

    If you try to set a value on a key that is undefined in the target
    object, then the unknownProperty() handler will be called instead. This
    gives you an opportunity to implement complex "virtual" properties that
    are not predefined on the object. If unknownProperty() returns
    undefined, then set() will simply set the value on the object.

    ### Property Observers

    In addition to changing the property, set() will also register a
    property change with the object. Unless you have placed this call
    inside of a beginPropertyChanges() and endPropertyChanges(), any "local"
    observers (i.e. observer methods declared on the same object), will be
    called immediately. Any "remote" observers (i.e. observer methods
    declared on another object) will be placed in a queue and called at a
    later time in a coalesced manner.

    ### Chaining

    In addition to property changes, set() returns the value of the object
    itself so you can do chaining like this:

          record.set('firstName', 'Charles').set('lastName', 'Jolley');

    @param {String} key The property to set
    @param {Object} value The value to set or null.
    @returns {Ember.Observable}
  */
  set: function(keyName, value) {
    set(this, keyName, value);
    return this;
  },

  /**
    To set multiple properties at once, call setProperties
    with a Hash:

          record.setProperties({ firstName: 'Charles', lastName: 'Jolley' });

    @param {Hash} hash the hash of keys and values to set
    @returns {Ember.Observable}
  */
  setProperties: function(hash) {
    return Ember.setProperties(this, hash);
  },

  /**
    Begins a grouping of property changes.

    You can use this method to group property changes so that notifications
    will not be sent until the changes are finished. If you plan to make a
    large number of changes to an object at one time, you should call this
    method at the beginning of the changes to begin deferring change
    notifications. When you are done making changes, call endPropertyChanges()
    to deliver the deferred change notifications and end deferring.

    @returns {Ember.Observable}
  */
  beginPropertyChanges: function() {
    Ember.beginPropertyChanges();
    return this;
  },

  /**
    Ends a grouping of property changes.

    You can use this method to group property changes so that notifications
    will not be sent until the changes are finished. If you plan to make a
    large number of changes to an object at one time, you should call
    beginPropertyChanges() at the beginning of the changes to defer change
    notifications. When you are done making changes, call this method to
    deliver the deferred change notifications and end deferring.

    @returns {Ember.Observable}
  */
  endPropertyChanges: function() {
    Ember.endPropertyChanges();
    return this;
  },

  /**
    Notify the observer system that a property is about to change.

    Sometimes you need to change a value directly or indirectly without
    actually calling get() or set() on it. In this case, you can use this
    method and propertyDidChange() instead. Calling these two methods
    together will notify all observers that the property has potentially
    changed value.

    Note that you must always call propertyWillChange and propertyDidChange as
    a pair. If you do not, it may get the property change groups out of order
    and cause notifications to be delivered more often than you would like.

    @param {String} key The property key that is about to change.
    @returns {Ember.Observable}
  */
  propertyWillChange: function(keyName){
    Ember.propertyWillChange(this, keyName);
    return this;
  },

  /**
    Notify the observer system that a property has just changed.

    Sometimes you need to change a value directly or indirectly without
    actually calling get() or set() on it. In this case, you can use this
    method and propertyWillChange() instead. Calling these two methods
    together will notify all observers that the property has potentially
    changed value.

    Note that you must always call propertyWillChange and propertyDidChange as
    a pair. If you do not, it may get the property change groups out of order
    and cause notifications to be delivered more often than you would like.

    @param {String} keyName The property key that has just changed.
    @returns {Ember.Observable}
  */
  propertyDidChange: function(keyName) {
    Ember.propertyDidChange(this, keyName);
    return this;
  },
  
  /**
    Convenience method to call `propertyWillChange` and `propertyDidChange` in
    succession.
  
    @param {String} keyName The property key to be notified about.
    @returns {Ember.Observable}
  */
  notifyPropertyChange: function(keyName) {
    this.propertyWillChange(keyName);
    this.propertyDidChange(keyName);
    return this;
  },

  /**
    Adds an observer on a property.

    This is the core method used to register an observer for a property.

    Once you call this method, anytime the key's value is set, your observer
    will be notified. Note that the observers are triggered anytime the
    value is set, regardless of whether it has actually changed. Your
    observer should be prepared to handle that.

    You can also pass an optional context parameter to this method. The
    context will be passed to your observer method whenever it is triggered.
    Note that if you add the same target/method pair on a key multiple times
    with different context parameters, your observer will only be called once
    with the last context you passed.

    ### Observer Methods

    Observer methods you pass should generally have the following signature if
    you do not pass a "context" parameter:

          fooDidChange: function(sender, key, value, rev);

    The sender is the object that changed. The key is the property that
    changes. The value property is currently reserved and unused. The rev
    is the last property revision of the object when it changed, which you can
    use to detect if the key value has really changed or not.

    If you pass a "context" parameter, the context will be passed before the
    revision like so:

          fooDidChange: function(sender, key, value, context, rev);

    Usually you will not need the value, context or revision parameters at
    the end. In this case, it is common to write observer methods that take
    only a sender and key value as parameters or, if you aren't interested in
    any of these values, to write an observer that has no parameters at all.

    @param {String} key The key to observer
    @param {Object} target The target object to invoke
    @param {String|Function} method The method to invoke.
    @returns {Ember.Object} self
  */
  addObserver: function(key, target, method) {
    Ember.addObserver(this, key, target, method);
  },

  /**
    Remove an observer you have previously registered on this object. Pass
    the same key, target, and method you passed to addObserver() and your
    target will no longer receive notifications.

    @param {String} key The key to observer
    @param {Object} target The target object to invoke
    @param {String|Function} method The method to invoke.
    @returns {Ember.Observable} receiver
  */
  removeObserver: function(key, target, method) {
    Ember.removeObserver(this, key, target, method);
  },

  /**
    Returns true if the object currently has observers registered for a
    particular key. You can use this method to potentially defer performing
    an expensive action until someone begins observing a particular property
    on the object.

    @param {String} key Key to check
    @returns {Boolean}
  */
  hasObserverFor: function(key) {
    return Ember.hasListeners(this, key+':change');
  },

  /**
    This method will be called when a client attempts to get the value of a
    property that has not been defined in one of the typical ways. Override
    this method to create "virtual" properties.
    
    @param {String} key The name of the unknown property that was requested.
    @returns {Object} The property value or undefined. Default is undefined.
  */
  unknownProperty: function(key) {
    return undefined;
  },

  /**
    This method will be called when a client attempts to set the value of a
    property that has not been defined in one of the typical ways. Override
    this method to create "virtual" properties.
    
    @param {String} key The name of the unknown property to be set.
    @param {Object} value The value the unknown property is to be set to.
  */
  setUnknownProperty: function(key, value) {
    this[key] = value;
  },

  /**
    This is like `get`, but allows you to pass in a dot-separated property
    path.
    
        person.getPath('address.zip'); // return the zip
        person.getPath('children.firstObject.age'); // return the first kid's age

    This reads much better than chained `get` calls.

    @param {String} path The property path to retrieve
    @returns {Object} The property value or undefined.
  */
  getPath: function(path) {
    return Ember.getPath(this, path);
  },

  /**
    This is like `set`, but allows you to specify the property you want to
    set as a dot-separated property path.
    
        person.setPath('address.zip', 10011); // set the zip to 10011
        person.setPath('children.firstObject.age', 6); // set the first kid's age to 6

    This is not as commonly used as `getPath`, but it can be useful.

    @param {String} path The path to the property that will be set
    @param {Object} value The value to set or null.
    @returns {Ember.Observable}
  */
  setPath: function(path, value) {
    Ember.setPath(this, path, value);
    return this;
  },

  /**
    Retrieves the value of a property, or a default value in the case that the property
    returns undefined.
    
        person.getWithDefault('lastName', 'Doe');
    
    @param {String} keyName The name of the property to retrieve
    @param {Object} defaultValue The value to return if the property value is undefined
    @returns {Object} The property value or the defaultValue.
  */
  getWithDefault: function(keyName, defaultValue) {
    return Ember.getWithDefault(this, keyName, defaultValue);
  },

  /**
    Set the value of a property to the current value plus some amount.
    
        person.incrementProperty('age');
        team.incrementProperty('score', 2);
    
    @param {String} keyName The name of the property to increment
    @param {Object} increment The amount to increment by. Defaults to 1
    @returns {Object} The new property value
  */
  incrementProperty: function(keyName, increment) {
    if (!increment) { increment = 1; }
    set(this, keyName, (get(this, keyName) || 0)+increment);
    return get(this, keyName);
  },
  
  /**
    Set the value of a property to the current value minus some amount.
    
        player.decrementProperty('lives');
        orc.decrementProperty('health', 5);
    
    @param {String} keyName The name of the property to decrement
    @param {Object} increment The amount to decrement by. Defaults to 1
    @returns {Object} The new property value
  */
  decrementProperty: function(keyName, increment) {
    if (!increment) { increment = 1; }
    set(this, keyName, (get(this, keyName) || 0)-increment);
    return get(this, keyName);
  },

  /**
    Set the value of a boolean property to the opposite of it's
    current value.
    
        starship.toggleProperty('warpDriveEnaged');
    
    @param {String} keyName The name of the property to toggle
    @returns {Object} The new property value
  */
  toggleProperty: function(keyName) {
    set(this, keyName, !get(this, keyName));
    return get(this, keyName);
  },

  /**
    Returns the cached value of a computed property, if it exists.
    This allows you to inspect the value of a computed property
    without accidentally invoking it if it is intended to be
    generated lazily.

    @param {String} keyName
    @returns {Object} The cached value of the computed property, if any
  */
  cacheFor: function(keyName) {
    return Ember.cacheFor(this, keyName);
  },

  /** @private - intended for debugging purposes */
  observersForKey: function(keyName) {
    return Ember.observersFor(this, keyName);
  }
});




})();



(function() {
var get = Ember.get, set = Ember.set, getPath = Ember.getPath;

Ember.TargetActionSupport = Ember.Mixin.create({
  target: null,
  action: null,

  targetObject: Ember.computed(function() {
    var target = get(this, 'target');

    if (Ember.typeOf(target) === "string") {
      var value = getPath(this, target);
      if (value === undefined) { value = getPath(window, target); }
      return value;
    } else {
      return target;
    }
  }).property('target').cacheable(),

  triggerAction: function() {
    var action = get(this, 'action'),
        target = get(this, 'targetObject');

    if (target && action) {
      var ret;

      if (typeof target.send === 'function') {
        ret = target.send(action, this);
      } else {
        if (typeof action === 'string') {
          action = target[action];
        }
        ret = action.call(target, this);
      }
      if (ret !== false) ret = true;

      return ret;
    } else {
      return false;
    }
  }
});

})();



(function() {
var get = Ember.get, set = Ember.set, a_slice = Array.prototype.slice;

/** @private */
function xform(target, method, params) {
  var args = a_slice.call(params, 2);
  method.apply(target, args);
}

Ember.Evented = Ember.Mixin.create({
  on: function(name, target, method) {
    if (!method) {
      method = target;
      target = null;
    }

    Ember.addListener(this, name, target, method, xform);
  },

  fire: function(name) {
    Ember.sendEvent.apply(null, [this, name].concat(a_slice.call(arguments, 1)));
  },

  off: function(name, target, method) {
    Ember.removeListener(this, name, target, method);
  }
});

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================



// NOTE: this object should never be included directly.  Instead use Ember.
// Ember.Object.  We only define this separately so that Ember.Set can depend on it



var rewatch = Ember.rewatch;
var classToString = Ember.Mixin.prototype.toString;
var set = Ember.set, get = Ember.get;
var o_create = Ember.platform.create,
    o_defineProperty = Ember.platform.defineProperty,
    a_slice = Array.prototype.slice,
    meta = Ember.meta;

/** @private */
function makeCtor() {

  // Note: avoid accessing any properties on the object since it makes the
  // method a lot faster.  This is glue code so we want it to be as fast as
  // possible.

  var wasApplied = false, initMixins, init = false, hasChains = false;

  var Class = function() {
    if (!wasApplied) { Class.proto(); } // prepare prototype...
    if (initMixins) {
      this.reopen.apply(this, initMixins);
      initMixins = null;
      rewatch(this); // always rewatch just in case
      Ember.Mixin.finishPartial(this);
      this.init.apply(this, arguments);
    } else {
      if (hasChains) {
        rewatch(this);
      } else {
        Ember.GUID_DESC.value = undefined;
        o_defineProperty(this, Ember.GUID_KEY, Ember.GUID_DESC);
      }
      if (init===false) { init = this.init; } // cache for later instantiations
      Ember.GUID_DESC.value = undefined;
      o_defineProperty(this, '_super', Ember.GUID_DESC);
      Ember.Mixin.finishPartial(this);
      init.apply(this, arguments);
    }
  };

  Class.toString = classToString;
  Class.willReopen = function() {
    if (wasApplied) {
      Class.PrototypeMixin = Ember.Mixin.create(Class.PrototypeMixin);
    }

    wasApplied = false;
  };
  Class._initMixins = function(args) { initMixins = args; };

  Class.proto = function() {
    var superclass = Class.superclass;
    if (superclass) { superclass.proto(); }

    if (!wasApplied) {
      wasApplied = true;
      Class.PrototypeMixin.applyPartial(Class.prototype);
      Ember.rewatch(Class.prototype); // setup watch chains if needed.
      hasChains = !!meta(Class.prototype, false).chains; // avoid rewatch
    }

    return this.prototype;
  };

  return Class;

}

var CoreObject = makeCtor();

CoreObject.PrototypeMixin = Ember.Mixin.create(
/** @scope Ember.CoreObject */ {

  reopen: function() {
    Ember.Mixin._apply(this, arguments, true);
    return this;
  },

  isInstance: true,

  /** @private */
  init: function() {},

  /** @field */
  isDestroyed: false,

  /** @field */
  isDestroying: false,

  /**
    Destroys an object by setting the isDestroyed flag and removing its
    metadata, which effectively destroys observers and bindings.

    If you try to set a property on a destroyed object, an exception will be
    raised.

    Note that destruction is scheduled for the end of the run loop and does not
    happen immediately.

    @returns {Ember.Object} receiver
  */
  destroy: function() {
    if (this.isDestroying) { return; }

    this.isDestroying = true;

    if (this.willDestroy) { this.willDestroy(); }

    set(this, 'isDestroyed', true);
    Ember.run.schedule('destroy', this, this._scheduledDestroy);
    return this;
  },

  /**
    Invoked by the run loop to actually destroy the object. This is
    scheduled for execution by the `destroy` method.

    @private
  */
  _scheduledDestroy: function() {
    Ember.destroy(this);
    if (this.didDestroy) { this.didDestroy(); }
  },

  bind: function(to, from) {
    if (!(from instanceof Ember.Binding)) { from = Ember.Binding.from(from); }
    from.to(to).connect(this);
    return from;
  },

  toString: function() {
    return '<'+this.constructor.toString()+':'+Ember.guidFor(this)+'>';
  }
});

CoreObject.__super__ = null;

var ClassMixin = Ember.Mixin.create({

  ClassMixin: Ember.required(),

  PrototypeMixin: Ember.required(),

  isClass: true,

  isMethod: false,

  extend: function() {
    var Class = makeCtor(), proto;
    Class.ClassMixin = Ember.Mixin.create(this.ClassMixin);
    Class.PrototypeMixin = Ember.Mixin.create(this.PrototypeMixin);

    Class.ClassMixin.ownerConstructor = Class;
    Class.PrototypeMixin.ownerConstructor = Class;

    var PrototypeMixin = Class.PrototypeMixin;
    PrototypeMixin.reopen.apply(PrototypeMixin, arguments);

    Class.superclass = this;
    Class.__super__  = this.prototype;

    proto = Class.prototype = o_create(this.prototype);
    proto.constructor = Class;
    Ember.generateGuid(proto, 'ember');
    meta(proto).proto = proto; // this will disable observers on prototype


    Class.subclasses = Ember.Set ? new Ember.Set() : null;
    if (this.subclasses) { this.subclasses.add(Class); }

    Class.ClassMixin.apply(Class);
    return Class;
  },

  create: function() {
    var C = this;
    if (arguments.length>0) { this._initMixins(arguments); }
    return new C();
  },

  reopen: function() {
    this.willReopen();
    var PrototypeMixin = this.PrototypeMixin;
    PrototypeMixin.reopen.apply(PrototypeMixin, arguments);
    return this;
  },

  reopenClass: function() {
    var ClassMixin = this.ClassMixin;
    ClassMixin.reopen.apply(ClassMixin, arguments);
    Ember.Mixin._apply(this, arguments, false);
    return this;
  },

  detect: function(obj) {
    if ('function' !== typeof obj) { return false; }
    while(obj) {
      if (obj===this) { return true; }
      obj = obj.superclass;
    }
    return false;
  },

  detectInstance: function(obj) {
    return obj instanceof this;
  },

  /**
    In some cases, you may want to annotate computed properties with additional
    metadata about how they function or what values they operate on. For example,
    computed property functions may close over variables that are then no longer
    available for introspection.

    You can pass a hash of these values to a computed property like this:

        person: function() {
          var personId = this.get('personId');
          return App.Person.create({ id: personId });
        }.property().meta({ type: App.Person })

    Once you've done this, you can retrieve the values saved to the computed
    property from your class like this:

        MyClass.metaForProperty('person');

    This will return the original hash that was passed to `meta()`.
  */
  metaForProperty: function(key) {
    var desc = meta(this.proto(), false).descs[key];

    Ember.assert("metaForProperty() could not find a computed property with key '"+key+"'.", !!desc && desc instanceof Ember.ComputedProperty);
    return desc._meta || {};
  },

  /**
    Iterate over each computed property for the class, passing its name
    and any associated metadata (see `metaForProperty`) to the callback.
  */
  eachComputedProperty: function(callback, binding) {
    var proto = this.proto(),
        descs = meta(proto).descs,
        empty = {},
        property;

    for (var name in descs) {
      property = descs[name];

      if (property instanceof Ember.ComputedProperty) {
        callback.call(binding || this, name, property._meta || empty);
      }
    }
  }

});

CoreObject.ClassMixin = ClassMixin;
ClassMixin.apply(CoreObject);

/**
  @class
*/
Ember.CoreObject = CoreObject;




})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var get = Ember.get, set = Ember.set, guidFor = Ember.guidFor, none = Ember.none;

/**
  @class

  An unordered collection of objects.

  A Set works a bit like an array except that its items are not ordered.
  You can create a set to efficiently test for membership for an object. You
  can also iterate through a set just like an array, even accessing objects
  by index, however there is no guarantee as to their order.

  All Sets are observable via the Enumerable Observer API - which works
  on any enumerable object including both Sets and Arrays.

  ## Creating a Set

  You can create a set like you would most objects using
  `new Ember.Set()`.  Most new sets you create will be empty, but you can
  also initialize the set with some content by passing an array or other
  enumerable of objects to the constructor.

  Finally, you can pass in an existing set and the set will be copied. You
  can also create a copy of a set by calling `Ember.Set#copy()`.

      #js
      // creates a new empty set
      var foundNames = new Ember.Set();

      // creates a set with four names in it.
      var names = new Ember.Set(["Charles", "Tom", "Juan", "Alex"]); // :P

      // creates a copy of the names set.
      var namesCopy = new Ember.Set(names);

      // same as above.
      var anotherNamesCopy = names.copy();

  ## Adding/Removing Objects

  You generally add or remove objects from a set using `add()` or
  `remove()`. You can add any type of object including primitives such as
  numbers, strings, and booleans.

  Unlike arrays, objects can only exist one time in a set. If you call `add()`
  on a set with the same object multiple times, the object will only be added
  once. Likewise, calling `remove()` with the same object multiple times will
  remove the object the first time and have no effect on future calls until
  you add the object to the set again.

  NOTE: You cannot add/remove null or undefined to a set. Any attempt to do so
  will be ignored.

  In addition to add/remove you can also call `push()`/`pop()`. Push behaves
  just like `add()` but `pop()`, unlike `remove()` will pick an arbitrary
  object, remove it and return it. This is a good way to use a set as a job
  queue when you don't care which order the jobs are executed in.

  ## Testing for an Object

  To test for an object's presence in a set you simply call
  `Ember.Set#contains()`.

  ## Observing changes

  When using `Ember.Set`, you can observe the `"[]"` property to be
  alerted whenever the content changes.  You can also add an enumerable
  observer to the set to be notified of specific objects that are added and
  removed from the set.  See `Ember.Enumerable` for more information on
  enumerables.

  This is often unhelpful. If you are filtering sets of objects, for instance,
  it is very inefficient to re-filter all of the items each time the set
  changes. It would be better if you could just adjust the filtered set based
  on what was changed on the original set. The same issue applies to merging
  sets, as well.

  ## Other Methods

  `Ember.Set` primary implements other mixin APIs.  For a complete reference
  on the methods you will use with `Ember.Set`, please consult these mixins.
  The most useful ones will be `Ember.Enumerable` and
  `Ember.MutableEnumerable` which implement most of the common iterator
  methods you are used to on Array.

  Note that you can also use the `Ember.Copyable` and `Ember.Freezable`
  APIs on `Ember.Set` as well.  Once a set is frozen it can no longer be
  modified.  The benefit of this is that when you call frozenCopy() on it,
  Ember will avoid making copies of the set.  This allows you to write
  code that can know with certainty when the underlying set data will or
  will not be modified.

  @extends Ember.Enumerable
  @extends Ember.MutableEnumerable
  @extends Ember.Copyable
  @extends Ember.Freezable

  @since Ember 0.9
*/
Ember.Set = Ember.CoreObject.extend(Ember.MutableEnumerable, Ember.Copyable, Ember.Freezable,
  /** @scope Ember.Set.prototype */ {

  // ..........................................................
  // IMPLEMENT ENUMERABLE APIS
  //

  /**
    This property will change as the number of objects in the set changes.

    @property Number
    @default 0
  */
  length: 0,

  /**
    Clears the set. This is useful if you want to reuse an existing set
    without having to recreate it.

        var colors = new Ember.Set(["red", "green", "blue"]);
        colors.length;  => 3
        colors.clear();
        colors.length;  => 0

    @returns {Ember.Set} An empty Set
  */
  clear: function() {
    if (this.isFrozen) { throw new Error(Ember.FROZEN_ERROR); }

    var len = get(this, 'length');
    if (len === 0) { return this; }

    var guid;

    this.enumerableContentWillChange(len, 0);
    Ember.propertyWillChange(this, 'firstObject');
    Ember.propertyWillChange(this, 'lastObject');

    for (var i=0; i < len; i++){
      guid = guidFor(this[i]);
      delete this[guid];
      delete this[i];
    }

    set(this, 'length', 0);

    Ember.propertyDidChange(this, 'firstObject');
    Ember.propertyDidChange(this, 'lastObject');
    this.enumerableContentDidChange(len, 0);

    return this;
  },

  /**
    Returns true if the passed object is also an enumerable that contains the
    same objects as the receiver.

        var colors = ["red", "green", "blue"],
            same_colors = new Ember.Set(colors);
        same_colors.isEqual(colors); => true
        same_colors.isEqual(["purple", "brown"]); => false

    @param {Ember.Set} obj the other object.
    @returns {Boolean}
  */
  isEqual: function(obj) {
    // fail fast
    if (!Ember.Enumerable.detect(obj)) return false;

    var loc = get(this, 'length');
    if (get(obj, 'length') !== loc) return false;

    while(--loc >= 0) {
      if (!obj.contains(this[loc])) return false;
    }

    return true;
  },

  /**
    Adds an object to the set. Only non-null objects can be added to a set
    and those can only be added once. If the object is already in the set or
    the passed value is null this method will have no effect.

    This is an alias for `Ember.MutableEnumerable.addObject()`.

        var colors = new Ember.Set();
        colors.add("blue");    => ["blue"]
        colors.add("blue");    => ["blue"]
        colors.add("red");     => ["blue", "red"]
        colors.add(null);      => ["blue", "red"]
        colors.add(undefined); => ["blue", "red"]

    @function
    @param {Object} obj The object to add.
    @returns {Ember.Set} The set itself.
  */
  add: Ember.alias('addObject'),

  /**
    Removes the object from the set if it is found.  If you pass a null value
    or an object that is already not in the set, this method will have no
    effect. This is an alias for `Ember.MutableEnumerable.removeObject()`.

        var colors = new Ember.Set(["red", "green", "blue"]);
        colors.remove("red");    => ["blue", "green"]
        colors.remove("purple"); => ["blue", "green"]
        colors.remove(null);     => ["blue", "green"]

    @function
    @param {Object} obj The object to remove
    @returns {Ember.Set} The set itself.
  */
  remove: Ember.alias('removeObject'),

  /**
    Removes the last element from the set and returns it, or null if it's empty.

        var colors = new Ember.Set(["green", "blue"]);
        colors.pop(); => "blue"
        colors.pop(); => "green"
        colors.pop(); => null

    @returns {Object} The removed object from the set or null.
  */
  pop: function() {
    if (get(this, 'isFrozen')) throw new Error(Ember.FROZEN_ERROR);
    var obj = this.length > 0 ? this[this.length-1] : null;
    this.remove(obj);
    return obj;
  },

  /**
    Inserts the given object on to the end of the set. It returns
    the set itself.

    This is an alias for `Ember.MutableEnumerable.addObject()`.

        var colors = new Ember.Set();
        colors.push("red");   => ["red"]
        colors.push("green"); => ["red", "green"]
        colors.push("blue");  => ["red", "green", "blue"]

    @function
    @returns {Ember.Set} The set itself.
  */
  push: Ember.alias('addObject'),

  /**
    Removes the last element from the set and returns it, or null if it's empty.

    This is an alias for `Ember.Set.pop()`.

        var colors = new Ember.Set(["green", "blue"]);
        colors.shift(); => "blue"
        colors.shift(); => "green"
        colors.shift(); => null

    @function
    @returns {Object} The removed object from the set or null.
  */
  shift: Ember.alias('pop'),

  /**
    Inserts the given object on to the end of the set. It returns
    the set itself.

    This is an alias of `Ember.Set.push()`

        var colors = new Ember.Set();
        colors.unshift("red");   => ["red"]
        colors.unshift("green"); => ["red", "green"]
        colors.unshift("blue");  => ["red", "green", "blue"]

    @function
    @returns {Ember.Set} The set itself.
  */
  unshift: Ember.alias('push'),

  /**
    Adds each object in the passed enumerable to the set.

    This is an alias of `Ember.MutableEnumerable.addObjects()`

        var colors = new Ember.Set();
        colors.addEach(["red", "green", "blue"]); => ["red", "green", "blue"]

    @function
    @param {Ember.Enumerable} objects the objects to add.
    @returns {Ember.Set} The set itself.
  */
  addEach: Ember.alias('addObjects'),

  /**
    Removes each object in the passed enumerable to the set.

    This is an alias of `Ember.MutableEnumerable.removeObjects()`

        var colors = new Ember.Set(["red", "green", "blue"]);
        colors.removeEach(["red", "blue"]); => ["green"]

    @function
    @param {Ember.Enumerable} objects the objects to remove.
    @returns {Ember.Set} The set itself.
  */
  removeEach: Ember.alias('removeObjects'),

  // ..........................................................
  // PRIVATE ENUMERABLE SUPPORT
  //

  /** @private */
  init: function(items) {
    this._super();
    if (items) this.addObjects(items);
  },

  /** @private (nodoc) - implement Ember.Enumerable */
  nextObject: function(idx) {
    return this[idx];
  },

  /** @private - more optimized version */
  firstObject: Ember.computed(function() {
    return this.length > 0 ? this[0] : undefined;
  }).property().cacheable(),

  /** @private - more optimized version */
  lastObject: Ember.computed(function() {
    return this.length > 0 ? this[this.length-1] : undefined;
  }).property().cacheable(),

  /** @private (nodoc) - implements Ember.MutableEnumerable */
  addObject: function(obj) {
    if (get(this, 'isFrozen')) throw new Error(Ember.FROZEN_ERROR);
    if (none(obj)) return this; // nothing to do

    var guid = guidFor(obj),
        idx  = this[guid],
        len  = get(this, 'length'),
        added ;

    if (idx>=0 && idx<len && (this[idx] === obj)) return this; // added

    added = [obj];

    this.enumerableContentWillChange(null, added);
    Ember.propertyWillChange(this, 'lastObject');

    len = get(this, 'length');
    this[guid] = len;
    this[len] = obj;
    set(this, 'length', len+1);

    Ember.propertyDidChange(this, 'lastObject');
    this.enumerableContentDidChange(null, added);

    return this;
  },

  /** @private (nodoc) - implements Ember.MutableEnumerable */
  removeObject: function(obj) {
    if (get(this, 'isFrozen')) throw new Error(Ember.FROZEN_ERROR);
    if (none(obj)) return this; // nothing to do

    var guid = guidFor(obj),
        idx  = this[guid],
        len = get(this, 'length'),
        isFirst = idx === 0,
        isLast = idx === len-1,
        last, removed;


    if (idx>=0 && idx<len && (this[idx] === obj)) {
      removed = [obj];

      this.enumerableContentWillChange(removed, null);
      if (isFirst) { Ember.propertyWillChange(this, 'firstObject'); }
      if (isLast)  { Ember.propertyWillChange(this, 'lastObject'); }

      // swap items - basically move the item to the end so it can be removed
      if (idx < len-1) {
        last = this[len-1];
        this[idx] = last;
        this[guidFor(last)] = idx;
      }

      delete this[guid];
      delete this[len-1];
      set(this, 'length', len-1);

      if (isFirst) { Ember.propertyDidChange(this, 'firstObject'); }
      if (isLast)  { Ember.propertyDidChange(this, 'lastObject'); }
      this.enumerableContentDidChange(removed, null);
    }

    return this;
  },

  /** @private (nodoc) - optimized version */
  contains: function(obj) {
    return this[guidFor(obj)]>=0;
  },

  /** @private (nodoc) */
  copy: function() {
    var C = this.constructor, ret = new C(), loc = get(this, 'length');
    set(ret, 'length', loc);
    while(--loc>=0) {
      ret[loc] = this[loc];
      ret[guidFor(this[loc])] = loc;
    }
    return ret;
  },

  /** @private */
  toString: function() {
    var len = this.length, idx, array = [];
    for(idx = 0; idx < len; idx++) {
      array[idx] = this[idx];
    }
    return "Ember.Set<%@>".fmt(array.join(','));
  }

});

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
Ember.CoreObject.subclasses = new Ember.Set();

/**
  @class
  @extends Ember.CoreObject
  @extends Ember.Observable
*/
Ember.Object = Ember.CoreObject.extend(Ember.Observable);




})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var indexOf = Ember.ArrayUtils.indexOf;

/**
  @private
  A Namespace is an object usually used to contain other objects or methods
  such as an application or framework.  Create a namespace anytime you want
  to define one of these new containers.

  # Example Usage

      MyFramework = Ember.Namespace.create({
        VERSION: '1.0.0'
      });

*/
Ember.Namespace = Ember.Object.extend({
  isNamespace: true,

  init: function() {
    Ember.Namespace.NAMESPACES.push(this);
    Ember.Namespace.PROCESSED = false;
  },

  toString: function() {
    Ember.identifyNamespaces();
    return this[Ember.GUID_KEY+'_name'];
  },

  destroy: function() {
    var namespaces = Ember.Namespace.NAMESPACES;
    window[this.toString()] = undefined;
    namespaces.splice(indexOf(namespaces, this), 1);
    this._super();
  }
});

Ember.Namespace.NAMESPACES = [Ember];
Ember.Namespace.PROCESSED = false;

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
/**
  @private

  Defines a namespace that will contain an executable application.  This is
  very similar to a normal namespace except that it is expected to include at
  least a 'ready' function which can be run to initialize the application.

  Currently Ember.Application is very similar to Ember.Namespace.  However, this
  class may be augmented by additional frameworks so it is important to use
  this instance when building new applications.

  # Example Usage

      MyApp = Ember.Application.create({
        VERSION: '1.0.0',
        store: Ember.Store.create().from(Ember.fixtures)
      });

      MyApp.ready = function() {
        //..init code goes here...
      }

*/
Ember.Application = Ember.Namespace.extend();


})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var get = Ember.get, set = Ember.set;

/**
  @class

  An ArrayProxy wraps any other object that implements Ember.Array and/or
  Ember.MutableArray, forwarding all requests. This makes it very useful for
  a number of binding use cases or other cases where being able to swap
  out the underlying array is useful.

  A simple example of usage:

      var pets = ['dog', 'cat', 'fish'];
      var ap = Ember.ArrayProxy.create({ content: Ember.A(pets) });
      ap.get('firstObject'); // => 'dog'
      ap.set('content', ['amoeba', 'paramecium']);
      ap.get('firstObject'); // => 'amoeba'

  This class can also be useful as a layer to transform the contents of
  an array, as they are accessed. This can be done by overriding
  `objectAtContent`:

      var pets = ['dog', 'cat', 'fish'];
      var ap = Ember.ArrayProxy.create({
          content: Ember.A(pets),
          objectAtContent: function(idx) {
              return this.get('content').objectAt(idx).toUpperCase();
          }
      });
      ap.get('firstObject'); // => 'DOG'


  @extends Ember.Object
  @extends Ember.Array
  @extends Ember.MutableArray
*/
Ember.ArrayProxy = Ember.Object.extend(Ember.MutableArray,
/** @scope Ember.ArrayProxy.prototype */ {

  /**
    The content array.  Must be an object that implements Ember.Array and/or
    Ember.MutableArray.

    @property {Ember.Array}
  */
  content: null,

  /**
    Should actually retrieve the object at the specified index from the
    content. You can override this method in subclasses to transform the
    content item to something new.

    This method will only be called if content is non-null.

    @param {Number} idx
      The index to retrieve.

    @returns {Object} the value or undefined if none found
  */
  objectAtContent: function(idx) {
    return get(this, 'content').objectAt(idx);
  },

  /**
    Should actually replace the specified objects on the content array.
    You can override this method in subclasses to transform the content item
    into something new.

    This method will only be called if content is non-null.

    @param {Number} idx
      The starting index

    @param {Number} amt
      The number of items to remove from the content.

    @param {Array} objects
      Optional array of objects to insert or null if no objects.

    @returns {void}
  */
  replaceContent: function(idx, amt, objects) {
    get(this, 'content').replace(idx, amt, objects);
  },

  /**
    Invoked when the content property is about to change. Notifies observers that the
    entire array content will change.
  */
  contentWillChange: Ember.beforeObserver(function() {
    var content = get(this, 'content'),
        len     = content ? get(content, 'length') : 0;
    this.arrayWillChange(content, 0, len, undefined);
    if (content) content.removeArrayObserver(this);
  }, 'content'),

  /**
    Invoked when the content property changes.  Notifies observers that the
    entire array content has changed.
  */
  contentDidChange: Ember.observer(function() {
    var content = get(this, 'content'),
        len     = content ? get(content, 'length') : 0;
    if (content) content.addArrayObserver(this);
    this.arrayDidChange(content, 0, undefined, len);
  }, 'content'),

  /** @private (nodoc) */
  objectAt: function(idx) {
    return get(this, 'content') && this.objectAtContent(idx);
  },

  /** @private (nodoc) */
  length: Ember.computed(function() {
    var content = get(this, 'content');
    return content ? get(content, 'length') : 0;
    // No dependencies since Enumerable notifies length of change
  }).property().cacheable(),

  /** @private (nodoc) */
  replace: function(idx, amt, objects) {
    if (get(this, 'content')) this.replaceContent(idx, amt, objects);
    return this;
  },

  /** @private (nodoc) */
  arrayWillChange: function(item, idx, removedCnt, addedCnt) {
    this.arrayContentWillChange(idx, removedCnt, addedCnt);
  },

  /** @private (nodoc) */
  arrayDidChange: function(item, idx, removedCnt, addedCnt) {
    this.arrayContentDidChange(idx, removedCnt, addedCnt);
  },

  /** @private (nodoc) */
  init: function() {
    this._super();
    this.contentWillChange();
    this.contentDidChange();
  }

});




})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var set = Ember.set, get = Ember.get, guidFor = Ember.guidFor;
var forEach = Ember.ArrayUtils.forEach;

var EachArray = Ember.Object.extend(Ember.Array, {

  init: function(content, keyName, owner) {
    this._super();
    this._keyName = keyName;
    this._owner   = owner;
    this._content = content;
  },

  objectAt: function(idx) {
    var item = this._content.objectAt(idx);
    return item && get(item, this._keyName);
  },

  length: Ember.computed(function() {
    var content = this._content;
    return content ? get(content, 'length') : 0;
  }).property().cacheable()

});

var IS_OBSERVER = /^.+:(before|change)$/;

/** @private */
function addObserverForContentKey(content, keyName, proxy, idx, loc) {
  var objects = proxy._objects, guid;
  if (!objects) objects = proxy._objects = {};

  while(--loc>=idx) {
    var item = content.objectAt(loc);
    if (item) {
      Ember.addBeforeObserver(item, keyName, proxy, 'contentKeyWillChange');
      Ember.addObserver(item, keyName, proxy, 'contentKeyDidChange');

      // keep track of the indicies each item was found at so we can map
      // it back when the obj changes.
      guid = guidFor(item);
      if (!objects[guid]) objects[guid] = [];
      objects[guid].push(loc);
    }
  }
}

/** @private */
function removeObserverForContentKey(content, keyName, proxy, idx, loc) {
  var objects = proxy._objects;
  if (!objects) objects = proxy._objects = {};
  var indicies, guid;

  while(--loc>=idx) {
    var item = content.objectAt(loc);
    if (item) {
      Ember.removeBeforeObserver(item, keyName, proxy, 'contentKeyWillChange');
      Ember.removeObserver(item, keyName, proxy, 'contentKeyDidChange');

      guid = guidFor(item);
      indicies = objects[guid];
      indicies[indicies.indexOf(loc)] = null;
    }
  }
}

/**
  @private
  @class

  This is the object instance returned when you get the @each property on an
  array.  It uses the unknownProperty handler to automatically create
  EachArray instances for property names.

  @extends Ember.Object
*/
Ember.EachProxy = Ember.Object.extend({

  init: function(content) {
    this._super();
    this._content = content;
    content.addArrayObserver(this);

    // in case someone is already observing some keys make sure they are
    // added
    forEach(Ember.watchedEvents(this), function(eventName) {
      this.didAddListener(eventName);
    }, this);
  },

  /**
    You can directly access mapped properties by simply requesting them.
    The unknownProperty handler will generate an EachArray of each item.
  */
  unknownProperty: function(keyName, value) {
    var ret;
    ret = new EachArray(this._content, keyName, this);
    new Ember.Descriptor().setup(this, keyName, ret);
    this.beginObservingContentKey(keyName);
    return ret;
  },

  // ..........................................................
  // ARRAY CHANGES
  // Invokes whenever the content array itself changes.

  arrayWillChange: function(content, idx, removedCnt, addedCnt) {
    var keys = this._keys, key, array, lim;

    lim = removedCnt>0 ? idx+removedCnt : -1;
    Ember.beginPropertyChanges(this);

    for(key in keys) {
      if (!keys.hasOwnProperty(key)) { continue; }

      if (lim>0) removeObserverForContentKey(content, key, this, idx, lim);

      Ember.propertyWillChange(this, key);
    }

    Ember.propertyWillChange(this._content, '@each');
    Ember.endPropertyChanges(this);
  },

  arrayDidChange: function(content, idx, removedCnt, addedCnt) {
    var keys = this._keys, key, array, lim;

    lim = addedCnt>0 ? idx+addedCnt : -1;
    Ember.beginPropertyChanges(this);

    for(key in keys) {
      if (!keys.hasOwnProperty(key)) { continue; }

      if (lim>0) addObserverForContentKey(content, key, this, idx, lim);

      Ember.propertyDidChange(this, key);
    }

    Ember.propertyDidChange(this._content, '@each');
    Ember.endPropertyChanges(this);
  },

  // ..........................................................
  // LISTEN FOR NEW OBSERVERS AND OTHER EVENT LISTENERS
  // Start monitoring keys based on who is listening...

  didAddListener: function(eventName) {
    if (IS_OBSERVER.test(eventName)) {
      this.beginObservingContentKey(eventName.slice(0, -7));
    }
  },

  didRemoveListener: function(eventName) {
    if (IS_OBSERVER.test(eventName)) {
      this.stopObservingContentKey(eventName.slice(0, -7));
    }
  },

  // ..........................................................
  // CONTENT KEY OBSERVING
  // Actual watch keys on the source content.

  beginObservingContentKey: function(keyName) {
    var keys = this._keys;
    if (!keys) keys = this._keys = {};
    if (!keys[keyName]) {
      keys[keyName] = 1;
      var content = this._content,
          len = get(content, 'length');
      addObserverForContentKey(content, keyName, this, 0, len);
    } else {
      keys[keyName]++;
    }
  },

  stopObservingContentKey: function(keyName) {
    var keys = this._keys;
    if (keys && (keys[keyName]>0) && (--keys[keyName]<=0)) {
      var content = this._content,
          len     = get(content, 'length');
      removeObserverForContentKey(content, keyName, this, 0, len);
    }
  },

  contentKeyWillChange: function(obj, keyName) {
    Ember.propertyWillChange(this, keyName);
  },

  contentKeyDidChange: function(obj, keyName) {
    Ember.propertyDidChange(this, keyName);
  }

});



})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
var get = Ember.get, set = Ember.set;

// Add Ember.Array to Array.prototype.  Remove methods with native
// implementations and supply some more optimized versions of generic methods
// because they are so common.
var NativeArray = Ember.Mixin.create(Ember.MutableArray, Ember.Observable, Ember.Copyable, {

  // because length is a built-in property we need to know to just get the
  // original property.
  get: function(key) {
    if (key==='length') return this.length;
    else if ('number' === typeof key) return this[key];
    else return this._super(key);
  },

  objectAt: function(idx) {
    return this[idx];
  },

  // primitive for array support.
  replace: function(idx, amt, objects) {

    if (this.isFrozen) throw Ember.FROZEN_ERROR ;

    // if we replaced exactly the same number of items, then pass only the
    // replaced range.  Otherwise, pass the full remaining array length
    // since everything has shifted
    var len = objects ? get(objects, 'length') : 0;
    this.arrayContentWillChange(idx, amt, len);

    if (!objects || objects.length === 0) {
      this.splice(idx, amt) ;
    } else {
      var args = [idx, amt].concat(objects) ;
      this.splice.apply(this,args) ;
    }

    this.arrayContentDidChange(idx, amt, len);
    return this ;
  },

  // If you ask for an unknown property, then try to collect the value
  // from member items.
  unknownProperty: function(key, value) {
    var ret;// = this.reducedProperty(key, value) ;
    if ((value !== undefined) && ret === undefined) {
      ret = this[key] = value;
    }
    return ret ;
  },

  // If browser did not implement indexOf natively, then override with
  // specialized version
  indexOf: function(object, startAt) {
    var idx, len = this.length;

    if (startAt === undefined) startAt = 0;
    else startAt = (startAt < 0) ? Math.ceil(startAt) : Math.floor(startAt);
    if (startAt < 0) startAt += len;

    for(idx=startAt;idx<len;idx++) {
      if (this[idx] === object) return idx ;
    }
    return -1;
  },

  lastIndexOf: function(object, startAt) {
    var idx, len = this.length;

    if (startAt === undefined) startAt = len-1;
    else startAt = (startAt < 0) ? Math.ceil(startAt) : Math.floor(startAt);
    if (startAt < 0) startAt += len;

    for(idx=startAt;idx>=0;idx--) {
      if (this[idx] === object) return idx ;
    }
    return -1;
  },

  copy: function() {
    return this.slice();
  }
});

// Remove any methods implemented natively so we don't override them
var ignore = ['length'];
Ember.ArrayUtils.forEach(NativeArray.keys(), function(methodName) {
  if (Array.prototype[methodName]) ignore.push(methodName);
});

if (ignore.length>0) {
  NativeArray = NativeArray.without.apply(NativeArray, ignore);
}

/**
  The NativeArray mixin contains the properties needed to to make the native
  Array support Ember.MutableArray and all of its dependent APIs.  Unless you
  have Ember.EXTEND_PROTOTYPES set to false, this will be applied automatically.
  Otherwise you can apply the mixin at anytime by calling
  `Ember.NativeArray.activate`.

  @namespace
  @extends Ember.MutableArray
  @extends Ember.Array
  @extends Ember.Enumerable
  @extends Ember.MutableEnumerable
  @extends Ember.Copyable
  @extends Ember.Freezable
*/
Ember.NativeArray = NativeArray;

/**
  Creates an Ember.NativeArray from an Array like object.
  Does not modify the original object.

  @returns {Ember.NativeArray}
*/
Ember.A = function(arr){
  if (arr === undefined) { arr = []; }
  return Ember.NativeArray.apply(arr);
};

/**
  Activates the mixin on the Array.prototype if not already applied.  Calling
  this method more than once is safe.

  @returns {void}
*/
Ember.NativeArray.activate = function() {
  NativeArray.apply(Array.prototype);

  Ember.A = function(arr) { return arr || []; };
};

if (Ember.EXTEND_PROTOTYPES) Ember.NativeArray.activate();



})();



(function() {
/**
  JavaScript (before ES6) does not have a Map implementation. Objects,
  which are often used as dictionaries, may only have Strings as keys.

  Because Ember has a way to get a unique identifier for every object
  via `Ember.guidFor`, we can implement a performant Map with arbitrary
  keys. Because it is commonly used in low-level bookkeeping, Map is
  implemented as a pure JavaScript object for performance.

  This implementation follows the current iteration of the ES6 proposal
  for maps (http://wiki.ecmascript.org/doku.php?id=harmony:simple_maps_and_sets),
  with two exceptions. First, because we need our implementation to be
  pleasant on older browsers, we do not use the `delete` name (using
  `remove` instead). Second, as we do not have the luxury of in-VM
  iteration, we implement a forEach method for iteration.

  Map is mocked out to look like an Ember object, so you can do
  `Ember.Map.create()` for symmetry with other Ember classes.
*/

/** @private */
var guidFor = Ember.guidFor;
var indexOf = Ember.ArrayUtils.indexOf;

// This class is used internally by Ember.js and Ember Data.
// Please do not use it at this time. We plan to clean it up
// and add many tests soon.
var OrderedSet = Ember.OrderedSet = function() {
  this.clear();
};

OrderedSet.create = function() {
  return new OrderedSet();
};

OrderedSet.prototype = {
  clear: function() {
    this.presenceSet = {};
    this.list = [];
  },

  add: function(obj) {
    var guid = guidFor(obj),
        presenceSet = this.presenceSet,
        list = this.list;

    if (guid in presenceSet) { return; }

    presenceSet[guid] = true;
    list.push(obj);
  },

  remove: function(obj) {
    var guid = guidFor(obj),
        presenceSet = this.presenceSet,
        list = this.list;

    delete presenceSet[guid];

    var index = indexOf(list, obj);
    if (index > -1) {
      list.splice(index, 1);
    }
  },

  isEmpty: function() {
    return this.list.length === 0;
  },

  forEach: function(fn, self) {
    // allow mutation during iteration
    var list = this.list.slice();

    for (var i = 0, j = list.length; i < j; i++) {
      fn.call(self, list[i]);
    }
  },

  toArray: function() {
    return this.list.slice();
  }
};

/**
  A Map stores values indexed by keys. Unlike JavaScript's
  default Objects, the keys of a Map can be any JavaScript
  object.

  Internally, a Map has two data structures:

    `keys`: an OrderedSet of all of the existing keys
    `values`: a JavaScript Object indexed by the
      Ember.guidFor(key)

  When a key/value pair is added for the first time, we
  add the key to the `keys` OrderedSet, and create or
  replace an entry in `values`. When an entry is deleted,
  we delete its entry in `keys` and `values`.
*/

/** @private */
var Map = Ember.Map = function() {
  this.keys = Ember.OrderedSet.create();
  this.values = {};
};

Map.create = function() {
  return new Map();
};

Map.prototype = {
  /**
    Retrieve the value associated with a given key.

    @param {anything} key
    @return {anything} the value associated with the key, or undefined
  */
  get: function(key) {
    var values = this.values,
        guid = guidFor(key);

    return values[guid];
  },

  /**
    Adds a value to the map. If a value for the given key has already been
    provided, the new value will replace the old value.

    @param {anything} key
    @param {anything} value
  */
  set: function(key, value) {
    var keys = this.keys,
        values = this.values,
        guid = guidFor(key);

    keys.add(key);
    values[guid] = value;
  },

  /**
    Removes a value from the map for an associated key.

    @param {anything} key
    @returns {Boolean} true if an item was removed, false otherwise
  */
  remove: function(key) {
    // don't use ES6 "delete" because it will be annoying
    // to use in browsers that are not ES6 friendly;
    var keys = this.keys,
        values = this.values,
        guid = guidFor(key),
        value;

    if (values.hasOwnProperty(guid)) {
      keys.remove(key);
      value = values[guid];
      delete values[guid];
      return true;
    } else {
      return false;
    }
  },

  /**
    Check whether a key is present.

    @param {anything} key
    @returns {Boolean} true if the item was present, false otherwise
  */
  has: function(key) {
    var values = this.values,
        guid = guidFor(key);

    return values.hasOwnProperty(guid);
  },

  /**
    Iterate over all the keys and values. Calls the function once
    for each key, passing in the key and value, in that order.

    The keys are guaranteed to be iterated over in insertion order.

    @param {Function} callback
    @param {anything} self if passed, the `this` value inside the
      callback. By default, `this` is the map.
  */
  forEach: function(callback, self) {
    var keys = this.keys,
        values = this.values;

    keys.forEach(function(key) {
      var guid = guidFor(key);
      callback.call(self, key, values[guid]);
    });
  }
};

})();



(function() {
var loadHooks = {};
var loaded = {};

Ember.onLoad = function(name, callback) {
  var object;

  loadHooks[name] = loadHooks[name] || Ember.A();
  loadHooks[name].pushObject(callback);

  if (object = loaded[name]) {
    callback(object);
  }
};

Ember.runLoadHooks = function(name, object) {
  var hooks;

  loaded[name] = object;

  if (hooks = loadHooks[name]) {
    loadHooks[name].forEach(function(callback) {
      callback(object);
    });
  }
};

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================
/**
  @class

  Ember.ArrayController provides a way for you to publish a collection of objects
  so that you can easily bind to the collection from a Handlebars #each helper,
  an Ember.CollectionView, or other controllers.

  The advantage of using an ArrayController is that you only have to set up
  your view bindings once; to change what's displayed, simply swap out the
  `content` property on the controller.

  For example, imagine you wanted to display a list of items fetched via an XHR
  request. Create an Ember.ArrayController and set its `content` property:

      MyApp.listController = Ember.ArrayController.create();

      $.get('people.json', function(data) {
        MyApp.listController.set('content', data);
      });

  Then, create a view that binds to your new controller:

      {{#each MyApp.listController}}
        {{firstName}} {{lastName}}
      {{/each}}

  Although you are binding to the controller, the behavior of this controller
  is to pass through any methods or properties to the underlying array. This
  capability comes from `Ember.ArrayProxy`, which this class inherits from.

  Note: As of this writing, `ArrayController` does not add any functionality
  to its superclass, `ArrayProxy`. The Ember team plans to add additional
  controller-specific functionality in the future, e.g. single or multiple
  selection support. If you are creating something that is conceptually a
  controller, use this class.

  @extends Ember.ArrayProxy
*/

Ember.ArrayController = Ember.ArrayProxy.extend();

})();



(function() {

})();



(function() {
// ==========================================================================
// Project:  Ember Runtime
// Copyright: ©2011 Strobe Inc. and contributors.
// License:   Licensed under MIT license (see license.js)
// ==========================================================================

})();