diff --git a/mocha.js b/mocha.js
index 3ca0ae9e67..1d5b072aca 100644
--- a/mocha.js
+++ b/mocha.js
@@ -912,6 +912,8 @@ module.exports = function(suites, context, mocha) {
         if (typeof opts.fn === 'function') {
           opts.fn.call(suite);
           suites.shift();
+        } else if (typeof opts.fn === 'undefined' && !suite.pending) {
+          throw new Error('Suite "' + suite.fullTitle() + '" was defined but no callback was supplied. Supply a callback or explicitly skip the suite.');
         }
 
         return suite;
@@ -1076,7 +1078,8 @@ module.exports = function(suite) {
       }
       return common.suite.create({
         title: title,
-        file: file
+        file: file,
+        fn: false
       });
     };
 
@@ -1090,7 +1093,8 @@ module.exports = function(suite) {
       }
       return common.suite.only({
         title: title,
-        file: file
+        file: file,
+        fn: false
       });
     };
 
@@ -4168,7 +4172,7 @@ Runnable.prototype.enableTimeouts = function(enabled) {
  * @api public
  */
 Runnable.prototype.skip = function() {
-  throw new Pending();
+  throw new Pending('sync skip');
 };
 
 /**
@@ -4333,14 +4337,19 @@ Runnable.prototype.run = function(fn) {
   if (this.async) {
     this.resetTimeout();
 
+    // allows skip() to be used in an explicit async context
+    this.skip = function asyncSkip() {
+      done(new Pending('async skip call'));
+      // halt execution.  the Runnable will be marked pending
+      // by the previous call, and the uncaught handler will ignore
+      // the failure.
+      throw new Pending('async skip; aborting execution');
+    };
+
     if (this.allowUncaught) {
       return callFnAsync(this.fn);
     }
     try {
-      // allows skip() to be used in an explicit async context
-      this.skip = function() {
-        done(new Pending());
-      };
       callFnAsync(this.fn);
     } catch (err) {
       done(utils.getError(err));
@@ -4634,6 +4643,10 @@ Runner.prototype.checkGlobals = function(test) {
  * @param {Error} err
  */
 Runner.prototype.fail = function(test, err) {
+  if (test.isPending()) {
+    return;
+  }
+
   ++this.failures;
   test.state = 'failed';
 
@@ -4720,9 +4733,11 @@ Runner.prototype.hook = function(name, fn) {
           if (name === 'beforeEach' || name === 'afterEach') {
             self.test.pending = true;
           } else {
-            suite.tests.forEach(function(test) {
+            utils.forEach(suite.tests, function(test) {
               test.pending = true;
             });
+            // a pending hook won't be executed twice.
+            hook.pending = true;
           }
         } else {
           self.failHook(hook, err);
@@ -4828,6 +4843,9 @@ Runner.prototype.runTest = function(fn) {
   var self = this;
   var test = this.test;
 
+  if (!test) {
+    return;
+  }
   if (this.asyncOnly) {
     test.asyncOnly = true;
   }
@@ -5109,8 +5127,8 @@ Runner.prototype.uncaught = function(err) {
 
   runnable.clearTimeout();
 
-  // Ignore errors if complete
-  if (runnable.state) {
+  // Ignore errors if complete or pending
+  if (runnable.state || runnable.isPending()) {
     return;
   }
   this.fail(runnable, err);
@@ -5268,7 +5286,7 @@ function filterOnly(suite) {
   } else {
     // Otherwise, do not run any of the tests in this suite.
     suite.tests = [];
-    suite._onlySuites.forEach(function(onlySuite) {
+    utils.forEach(suite._onlySuites, function(onlySuite) {
       // If there are other `only` tests/suites nested in the current `only` suite, then filter that `only` suite.
       // Otherwise, all of the tests on this `only` suite should be run, so don't filter it.
       if (hasOnly(onlySuite)) {
@@ -5306,7 +5324,7 @@ function hasOnly(suite) {
 function filterLeaks(ok, globals) {
   return filter(globals, function(key) {
     // Firefox and Chrome exposes iframes as index inside the window object
-    if (/^d+/.test(key)) {
+    if (/^\d+/.test(key)) {
       return false;
     }
 
@@ -5868,7 +5886,8 @@ var basename = require('path').basename;
 var debug = require('debug')('mocha:watch');
 var exists = require('fs').existsSync || require('path').existsSync;
 var glob = require('glob');
-var join = require('path').join;
+var path = require('path');
+var join = path.join;
 var readdirSync = require('fs').readdirSync;
 var statSync = require('fs').statSync;
 var watchFile = require('fs').watchFile;
@@ -5948,7 +5967,7 @@ exports.map = function(arr, fn, scope) {
  * @param {number} start
  * @return {number}
  */
-exports.indexOf = function(arr, obj, start) {
+var indexOf = exports.indexOf = function(arr, obj, start) {
   for (var i = start || 0, l = arr.length; i < l; i++) {
     if (arr[i] === obj) {
       return i;
@@ -5966,7 +5985,7 @@ exports.indexOf = function(arr, obj, start) {
  * @param {Object} val Initial value.
  * @return {*}
  */
-exports.reduce = function(arr, fn, val) {
+var reduce = exports.reduce = function(arr, fn, val) {
   var rval = val;
 
   for (var i = 0, l = arr.length; i < l; i++) {
@@ -6172,7 +6191,7 @@ exports.trim = function(str) {
  * @return {Object}
  */
 exports.parseQuery = function(qs) {
-  return exports.reduce(qs.replace('?', '').split('&'), function(obj, pair) {
+  return reduce(qs.replace('?', '').split('&'), function(obj, pair) {
     var i = pair.indexOf('=');
     var key = pair.slice(0, i);
     var val = pair.slice(++i);
@@ -6225,13 +6244,11 @@ exports.highlightTags = function(name) {
  *
  * @api private
  * @param {*} value The value to inspect.
- * @param {string} [type] The type of the value, if known.
+ * @param {string} typeHint The type of the value
  * @returns {string}
  */
-function emptyRepresentation(value, type) {
-  type = type || exports.type(value);
-
-  switch (type) {
+function emptyRepresentation(value, typeHint) {
+  switch (typeHint) {
     case 'function':
       return '[Function]';
     case 'object':
@@ -6250,7 +6267,7 @@ function emptyRepresentation(value, type) {
  * @api private
  * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toString
  * @param {*} value The value to test.
- * @returns {string}
+ * @returns {string} Computed type
  * @example
  * type({}) // 'object'
  * type([]) // 'array'
@@ -6262,8 +6279,9 @@ function emptyRepresentation(value, type) {
  * type(/foo/) // 'regexp'
  * type('type') // 'string'
  * type(global) // 'global'
+ * type(new String('foo') // 'object'
  */
-exports.type = function type(value) {
+var type = exports.type = function type(value) {
   if (value === undefined) {
     return 'undefined';
   } else if (value === null) {
@@ -6292,25 +6310,36 @@ exports.type = function type(value) {
  * @return {string}
  */
 exports.stringify = function(value) {
-  var type = exports.type(value);
-
-  if (!~exports.indexOf(['object', 'array', 'function'], type)) {
-    if (type !== 'buffer') {
+  var typeHint = type(value);
+
+  if (!~indexOf(['object', 'array', 'function'], typeHint)) {
+    if (typeHint === 'buffer') {
+      var json = value.toJSON();
+      // Based on the toJSON result
+      return jsonStringify(json.data && json.type ? json.data : json, 2)
+        .replace(/,(\n|$)/g, '$1');
+    }
+
+    // IE7/IE8 has a bizarre String constructor; needs to be coerced
+    // into an array and back to obj.
+    if (typeHint === 'string' && typeof value === 'object') {
+      value = reduce(value.split(''), function(acc, char, idx) {
+        acc[idx] = char;
+        return acc;
+      }, {});
+      typeHint = 'object';
+    } else {
       return jsonStringify(value);
     }
-    var json = value.toJSON();
-    // Based on the toJSON result
-    return jsonStringify(json.data && json.type ? json.data : json, 2)
-      .replace(/,(\n|$)/g, '$1');
   }
 
   for (var prop in value) {
     if (Object.prototype.hasOwnProperty.call(value, prop)) {
-      return jsonStringify(exports.canonicalize(value), 2).replace(/,(\n|$)/g, '$1');
+      return jsonStringify(exports.canonicalize(value, null, typeHint), 2).replace(/,(\n|$)/g, '$1');
     }
   }
 
-  return emptyRepresentation(value, type);
+  return emptyRepresentation(value, typeHint);
 };
 
 /**
@@ -6339,7 +6368,7 @@ function jsonStringify(object, spaces, depth) {
   }
 
   function _stringify(val) {
-    switch (exports.type(val)) {
+    switch (type(val)) {
       case 'null':
       case 'undefined':
         val = '[' + val + ']';
@@ -6422,14 +6451,15 @@ exports.isBuffer = function(value) {
  * @see {@link exports.stringify}
  * @param {*} value Thing to inspect.  May or may not have properties.
  * @param {Array} [stack=[]] Stack of seen values
+ * @param {string} [typeHint] Type hint
  * @return {(Object|Array|Function|string|undefined)}
  */
-exports.canonicalize = function(value, stack) {
+exports.canonicalize = function canonicalize(value, stack, typeHint) {
   var canonicalizedObj;
   /* eslint-disable no-unused-vars */
   var prop;
   /* eslint-enable no-unused-vars */
-  var type = exports.type(value);
+  typeHint = typeHint || type(value);
   function withStack(value, fn) {
     stack.push(value);
     fn();
@@ -6438,11 +6468,11 @@ exports.canonicalize = function(value, stack) {
 
   stack = stack || [];
 
-  if (exports.indexOf(stack, value) !== -1) {
+  if (indexOf(stack, value) !== -1) {
     return '[Circular]';
   }
 
-  switch (type) {
+  switch (typeHint) {
     case 'undefined':
     case 'buffer':
     case 'null':
@@ -6463,7 +6493,7 @@ exports.canonicalize = function(value, stack) {
       }
       /* eslint-enable guard-for-in */
       if (!canonicalizedObj) {
-        canonicalizedObj = emptyRepresentation(value, type);
+        canonicalizedObj = emptyRepresentation(value, typeHint);
         break;
       }
     /* falls through */
@@ -6579,16 +6609,20 @@ exports.getError = function(err) {
  */
 exports.stackTraceFilter = function() {
   // TODO: Replace with `process.browser`
-  var slash = '/';
   var is = typeof document === 'undefined' ? { node: true } : { browser: true };
-  var cwd = is.node
-      ? process.cwd() + slash
-      : (typeof location === 'undefined' ? window.location : location).href.replace(/\/[^\/]*$/, '/');
+  var slash = path.sep;
+  var cwd;
+  if (is.node) {
+    cwd = process.cwd() + slash;
+  } else {
+    cwd = (typeof location === 'undefined' ? window.location : location).href.replace(/\/[^\/]*$/, '/');
+    slash = '/';
+  }
 
   function isMochaInternal(line) {
     return (~line.indexOf('node_modules' + slash + 'mocha' + slash))
-      || (~line.indexOf('components' + slash + 'mochajs' + slash))
-      || (~line.indexOf('components' + slash + 'mocha' + slash))
+      || (~line.indexOf('node_modules' + slash + 'mocha.js'))
+      || (~line.indexOf('bower_components' + slash + 'mocha.js'))
       || (~line.indexOf(slash + 'mocha.js'));
   }
 
@@ -6604,7 +6638,7 @@ exports.stackTraceFilter = function() {
   return function(stack) {
     stack = stack.split('\n');
 
-    stack = exports.reduce(stack, function(list, line) {
+    stack = reduce(stack, function(list, line) {
       if (isMochaInternal(line)) {
         return list;
       }
@@ -6637,7 +6671,7 @@ exports.isPromise = function isPromise(value) {
 };
 
 }).call(this,require('_process'),require("buffer").Buffer)
-},{"./to-iso-string":37,"_process":67,"buffer":44,"debug":2,"fs":42,"glob":42,"json3":54,"path":42,"util":82}],39:[function(require,module,exports){
+},{"./to-iso-string":37,"_process":67,"buffer":44,"debug":2,"fs":42,"glob":42,"json3":54,"path":42,"util":84}],39:[function(require,module,exports){
 'use strict'
 
 exports.toByteArray = toByteArray
@@ -6779,7 +6813,7 @@ BrowserStdout.prototype._write = function(chunks, encoding, cb) {
 }
 
 }).call(this,require('_process'))
-},{"_process":67,"stream":78,"util":82}],42:[function(require,module,exports){
+},{"_process":67,"stream":79,"util":84}],42:[function(require,module,exports){
 arguments[4][40][0].apply(exports,arguments)
 },{"dup":40}],43:[function(require,module,exports){
 (function (global){
@@ -7062,6 +7096,8 @@ if (Buffer.TYPED_ARRAY_SUPPORT) {
 function assertSize (size) {
   if (typeof size !== 'number') {
     throw new TypeError('"size" argument must be a number')
+  } else if (size < 0) {
+    throw new RangeError('"size" argument must not be negative')
   }
 }
 
@@ -7125,12 +7161,20 @@ function fromString (that, string, encoding) {
   var length = byteLength(string, encoding) | 0
   that = createBuffer(that, length)
 
-  that.write(string, encoding)
+  var actual = that.write(string, encoding)
+
+  if (actual !== length) {
+    // Writing a hex string, for example, that contains invalid characters will
+    // cause everything after the first invalid character to be ignored. (e.g.
+    // 'abxxcd' will be treated as 'ab')
+    that = that.slice(0, actual)
+  }
+
   return that
 }
 
 function fromArrayLike (that, array) {
-  var length = checked(array.length) | 0
+  var length = array.length < 0 ? 0 : checked(array.length) | 0
   that = createBuffer(that, length)
   for (var i = 0; i < length; i += 1) {
     that[i] = array[i] & 255
@@ -7149,7 +7193,9 @@ function fromArrayBuffer (that, array, byteOffset, length) {
     throw new RangeError('\'length\' is out of bounds')
   }
 
-  if (length === undefined) {
+  if (byteOffset === undefined && length === undefined) {
+    array = new Uint8Array(array)
+  } else if (length === undefined) {
     array = new Uint8Array(array, byteOffset)
   } else {
     array = new Uint8Array(array, byteOffset, length)
@@ -7197,7 +7243,7 @@ function fromObject (that, obj) {
 }
 
 function checked (length) {
-  // Note: cannot use `length < kMaxLength` here because that fails when
+  // Note: cannot use `length < kMaxLength()` here because that fails when
   // length is NaN (which is otherwise coerced to zero.)
   if (length >= kMaxLength()) {
     throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
@@ -7246,9 +7292,9 @@ Buffer.isEncoding = function isEncoding (encoding) {
     case 'utf8':
     case 'utf-8':
     case 'ascii':
+    case 'latin1':
     case 'binary':
     case 'base64':
-    case 'raw':
     case 'ucs2':
     case 'ucs-2':
     case 'utf16le':
@@ -7309,9 +7355,8 @@ function byteLength (string, encoding) {
   for (;;) {
     switch (encoding) {
       case 'ascii':
+      case 'latin1':
       case 'binary':
-      case 'raw':
-      case 'raws':
         return len
       case 'utf8':
       case 'utf-8':
@@ -7384,8 +7429,9 @@ function slowToString (encoding, start, end) {
       case 'ascii':
         return asciiSlice(this, start, end)
 
+      case 'latin1':
       case 'binary':
-        return binarySlice(this, start, end)
+        return latin1Slice(this, start, end)
 
       case 'base64':
         return base64Slice(this, start, end)
@@ -7437,6 +7483,20 @@ Buffer.prototype.swap32 = function swap32 () {
   return this
 }
 
+Buffer.prototype.swap64 = function swap64 () {
+  var len = this.length
+  if (len % 8 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 64-bits')
+  }
+  for (var i = 0; i < len; i += 8) {
+    swap(this, i, i + 7)
+    swap(this, i + 1, i + 6)
+    swap(this, i + 2, i + 5)
+    swap(this, i + 3, i + 4)
+  }
+  return this
+}
+
 Buffer.prototype.toString = function toString () {
   var length = this.length | 0
   if (length === 0) return ''
@@ -7519,7 +7579,73 @@ Buffer.prototype.compare = function compare (target, start, end, thisStart, this
   return 0
 }
 
-function arrayIndexOf (arr, val, byteOffset, encoding) {
+// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
+// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
+//
+// Arguments:
+// - buffer - a Buffer to search
+// - val - a string, Buffer, or number
+// - byteOffset - an index into `buffer`; will be clamped to an int32
+// - encoding - an optional encoding, relevant is val is a string
+// - dir - true for indexOf, false for lastIndexOf
+function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
+  // Empty buffer means no match
+  if (buffer.length === 0) return -1
+
+  // Normalize byteOffset
+  if (typeof byteOffset === 'string') {
+    encoding = byteOffset
+    byteOffset = 0
+  } else if (byteOffset > 0x7fffffff) {
+    byteOffset = 0x7fffffff
+  } else if (byteOffset < -0x80000000) {
+    byteOffset = -0x80000000
+  }
+  byteOffset = +byteOffset  // Coerce to Number.
+  if (isNaN(byteOffset)) {
+    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
+    byteOffset = dir ? 0 : (buffer.length - 1)
+  }
+
+  // Normalize byteOffset: negative offsets start from the end of the buffer
+  if (byteOffset < 0) byteOffset = buffer.length + byteOffset
+  if (byteOffset >= buffer.length) {
+    if (dir) return -1
+    else byteOffset = buffer.length - 1
+  } else if (byteOffset < 0) {
+    if (dir) byteOffset = 0
+    else return -1
+  }
+
+  // Normalize val
+  if (typeof val === 'string') {
+    val = Buffer.from(val, encoding)
+  }
+
+  // Finally, search either indexOf (if dir is true) or lastIndexOf
+  if (Buffer.isBuffer(val)) {
+    // Special case: looking for empty string/buffer always fails
+    if (val.length === 0) {
+      return -1
+    }
+    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
+  } else if (typeof val === 'number') {
+    val = val & 0xFF // Search for a byte value [0-255]
+    if (Buffer.TYPED_ARRAY_SUPPORT &&
+        typeof Uint8Array.prototype.indexOf === 'function') {
+      if (dir) {
+        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
+      } else {
+        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
+      }
+    }
+    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
+  }
+
+  throw new TypeError('val must be string, number or Buffer')
+}
+
+function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
   var indexSize = 1
   var arrLength = arr.length
   var valLength = val.length
@@ -7546,60 +7672,45 @@ function arrayIndexOf (arr, val, byteOffset, encoding) {
     }
   }
 
-  var foundIndex = -1
-  for (var i = byteOffset; i < arrLength; ++i) {
-    if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
-      if (foundIndex === -1) foundIndex = i
-      if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
-    } else {
-      if (foundIndex !== -1) i -= i - foundIndex
-      foundIndex = -1
+  var i
+  if (dir) {
+    var foundIndex = -1
+    for (i = byteOffset; i < arrLength; i++) {
+      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
+        if (foundIndex === -1) foundIndex = i
+        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
+      } else {
+        if (foundIndex !== -1) i -= i - foundIndex
+        foundIndex = -1
+      }
+    }
+  } else {
+    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
+    for (i = byteOffset; i >= 0; i--) {
+      var found = true
+      for (var j = 0; j < valLength; j++) {
+        if (read(arr, i + j) !== read(val, j)) {
+          found = false
+          break
+        }
+      }
+      if (found) return i
     }
   }
 
   return -1
 }
 
-Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
-  if (typeof byteOffset === 'string') {
-    encoding = byteOffset
-    byteOffset = 0
-  } else if (byteOffset > 0x7fffffff) {
-    byteOffset = 0x7fffffff
-  } else if (byteOffset < -0x80000000) {
-    byteOffset = -0x80000000
-  }
-  byteOffset >>= 0
-
-  if (this.length === 0) return -1
-  if (byteOffset >= this.length) return -1
-
-  // Negative offsets start from the end of the buffer
-  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)
-
-  if (typeof val === 'string') {
-    val = Buffer.from(val, encoding)
-  }
-
-  if (Buffer.isBuffer(val)) {
-    // special case: looking for empty string/buffer always fails
-    if (val.length === 0) {
-      return -1
-    }
-    return arrayIndexOf(this, val, byteOffset, encoding)
-  }
-  if (typeof val === 'number') {
-    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {
-      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)
-    }
-    return arrayIndexOf(this, [ val ], byteOffset, encoding)
-  }
+Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
+  return this.indexOf(val, byteOffset, encoding) !== -1
+}
 
-  throw new TypeError('val must be string, number or Buffer')
+Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
 }
 
-Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
-  return this.indexOf(val, byteOffset, encoding) !== -1
+Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
 }
 
 function hexWrite (buf, string, offset, length) {
@@ -7616,7 +7727,7 @@ function hexWrite (buf, string, offset, length) {
 
   // must be an even number of digits
   var strLen = string.length
-  if (strLen % 2 !== 0) throw new Error('Invalid hex string')
+  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')
 
   if (length > strLen / 2) {
     length = strLen / 2
@@ -7637,7 +7748,7 @@ function asciiWrite (buf, string, offset, length) {
   return blitBuffer(asciiToBytes(string), buf, offset, length)
 }
 
-function binaryWrite (buf, string, offset, length) {
+function latin1Write (buf, string, offset, length) {
   return asciiWrite(buf, string, offset, length)
 }
 
@@ -7699,8 +7810,9 @@ Buffer.prototype.write = function write (string, offset, length, encoding) {
       case 'ascii':
         return asciiWrite(this, string, offset, length)
 
+      case 'latin1':
       case 'binary':
-        return binaryWrite(this, string, offset, length)
+        return latin1Write(this, string, offset, length)
 
       case 'base64':
         // Warning: maxLength not taken into account in base64Write
@@ -7841,7 +7953,7 @@ function asciiSlice (buf, start, end) {
   return ret
 }
 
-function binarySlice (buf, start, end) {
+function latin1Slice (buf, start, end) {
   var ret = ''
   end = Math.min(buf.length, end)
 
@@ -10063,22 +10175,26 @@ if (typeof Object.create === 'function') {
 }
 
 },{}],52:[function(require,module,exports){
-/**
- * Determine if an object is Buffer
- *
- * Author:   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
- * License:  MIT
+/*!
+ * Determine if an object is a Buffer
  *
- * `npm install is-buffer`
+ * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
+ * @license  MIT
  */
 
+// The _isBuffer check is for Safari 5-7 support, because it's missing
+// Object.prototype.constructor. Remove this eventually
 module.exports = function (obj) {
-  return !!(obj != null &&
-    (obj._isBuffer || // For Safari 5-7 (missing Object.prototype.constructor)
-      (obj.constructor &&
-      typeof obj.constructor.isBuffer === 'function' &&
-      obj.constructor.isBuffer(obj))
-    ))
+  return obj != null && (isBuffer(obj) || isSlowBuffer(obj) || !!obj._isBuffer)
+}
+
+function isBuffer (obj) {
+  return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
+}
+
+// For Node v0.10 support. Remove this eventually.
+function isSlowBuffer (obj) {
+  return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0))
 }
 
 },{}],53:[function(require,module,exports){
@@ -11448,12 +11564,12 @@ module.exports = create;
 
 },{"lodash._baseassign":55,"lodash._basecreate":57,"lodash._isiterateecall":59}],61:[function(require,module,exports){
 /**
- * lodash 3.0.8 (Custom Build) <https://lodash.com/>
+ * lodash (Custom Build) <https://lodash.com/>
  * Build: `lodash modularize exports="npm" -o ./`
- * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
+ * Copyright jQuery Foundation and other contributors <https://jquery.org/>
+ * Released under MIT license <https://lodash.com/license>
  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
- * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- * Available under MIT license <https://lodash.com/license>
+ * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  */
 
 /** Used as references for various `Number` constants. */
@@ -11471,7 +11587,8 @@ var objectProto = Object.prototype;
 var hasOwnProperty = objectProto.hasOwnProperty;
 
 /**
- * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  * of values.
  */
 var objectToString = objectProto.toString;
@@ -11479,39 +11596,16 @@ var objectToString = objectProto.toString;
 /** Built-in value references. */
 var propertyIsEnumerable = objectProto.propertyIsEnumerable;
 
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
-/**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792)
- * that affects Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
-var getLength = baseProperty('length');
-
 /**
  * Checks if `value` is likely an `arguments` object.
  *
  * @static
  * @memberOf _
+ * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ *  else `false`.
  * @example
  *
  * _.isArguments(function() { return arguments; }());
@@ -11521,7 +11615,7 @@ var getLength = baseProperty('length');
  * // => false
  */
 function isArguments(value) {
-  // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
+  // Safari 8.1 makes `arguments.callee` enumerable in strict mode.
   return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
     (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
 }
@@ -11533,6 +11627,7 @@ function isArguments(value) {
  *
  * @static
  * @memberOf _
+ * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
  * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
@@ -11551,7 +11646,7 @@ function isArguments(value) {
  * // => false
  */
 function isArrayLike(value) {
-  return value != null && isLength(getLength(value)) && !isFunction(value);
+  return value != null && isLength(value.length) && !isFunction(value);
 }
 
 /**
@@ -11560,9 +11655,11 @@ function isArrayLike(value) {
  *
  * @static
  * @memberOf _
+ * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an array-like object, else `false`.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ *  else `false`.
  * @example
  *
  * _.isArrayLikeObject([1, 2, 3]);
@@ -11586,9 +11683,10 @@ function isArrayLikeObject(value) {
  *
  * @static
  * @memberOf _
+ * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  * @example
  *
  * _.isFunction(_);
@@ -11599,8 +11697,7 @@ function isArrayLikeObject(value) {
  */
 function isFunction(value) {
   // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 8 which returns 'object' for typed array and weak map constructors,
-  // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
+  // in Safari 8-9 which returns 'object' for typed array and other constructors.
   var tag = isObject(value) ? objectToString.call(value) : '';
   return tag == funcTag || tag == genTag;
 }
@@ -11608,10 +11705,12 @@ function isFunction(value) {
 /**
  * Checks if `value` is a valid array-like length.
  *
- * **Note:** This function is loosely based on [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  *
  * @static
  * @memberOf _
+ * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
  * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
@@ -11635,11 +11734,13 @@ function isLength(value) {
 }
 
 /**
- * Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.
- * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  *
  * @static
  * @memberOf _
+ * @since 0.1.0
  * @category Lang
  * @param {*} value The value to check.
  * @returns {boolean} Returns `true` if `value` is an object, else `false`.
@@ -11668,6 +11769,7 @@ function isObject(value) {
  *
  * @static
  * @memberOf _
+ * @since 4.0.0
  * @category Lang
  * @param {*} value The value to check.
  * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
@@ -12309,7 +12411,6 @@ function nextTick(fn, arg1, arg2, arg3) {
 }).call(this,require('_process'))
 },{"_process":67}],67:[function(require,module,exports){
 // shim for using process in browser
-
 var process = module.exports = {};
 
 // cached from whatever global is present so that test runners that stub it
@@ -12320,22 +12421,84 @@ var process = module.exports = {};
 var cachedSetTimeout;
 var cachedClearTimeout;
 
+function defaultSetTimout() {
+    throw new Error('setTimeout has not been defined');
+}
+function defaultClearTimeout () {
+    throw new Error('clearTimeout has not been defined');
+}
 (function () {
-  try {
-    cachedSetTimeout = setTimeout;
-  } catch (e) {
-    cachedSetTimeout = function () {
-      throw new Error('setTimeout is not defined');
+    try {
+        if (typeof setTimeout === 'function') {
+            cachedSetTimeout = setTimeout;
+        } else {
+            cachedSetTimeout = defaultSetTimout;
+        }
+    } catch (e) {
+        cachedSetTimeout = defaultSetTimout;
     }
-  }
-  try {
-    cachedClearTimeout = clearTimeout;
-  } catch (e) {
-    cachedClearTimeout = function () {
-      throw new Error('clearTimeout is not defined');
+    try {
+        if (typeof clearTimeout === 'function') {
+            cachedClearTimeout = clearTimeout;
+        } else {
+            cachedClearTimeout = defaultClearTimeout;
+        }
+    } catch (e) {
+        cachedClearTimeout = defaultClearTimeout;
     }
-  }
 } ())
+function runTimeout(fun) {
+    if (cachedSetTimeout === setTimeout) {
+        //normal enviroments in sane situations
+        return setTimeout(fun, 0);
+    }
+    // if setTimeout wasn't available but was latter defined
+    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
+        cachedSetTimeout = setTimeout;
+        return setTimeout(fun, 0);
+    }
+    try {
+        // when when somebody has screwed with setTimeout but no I.E. maddness
+        return cachedSetTimeout(fun, 0);
+    } catch(e){
+        try {
+            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
+            return cachedSetTimeout.call(null, fun, 0);
+        } catch(e){
+            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
+            return cachedSetTimeout.call(this, fun, 0);
+        }
+    }
+
+
+}
+function runClearTimeout(marker) {
+    if (cachedClearTimeout === clearTimeout) {
+        //normal enviroments in sane situations
+        return clearTimeout(marker);
+    }
+    // if clearTimeout wasn't available but was latter defined
+    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
+        cachedClearTimeout = clearTimeout;
+        return clearTimeout(marker);
+    }
+    try {
+        // when when somebody has screwed with setTimeout but no I.E. maddness
+        return cachedClearTimeout(marker);
+    } catch (e){
+        try {
+            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
+            return cachedClearTimeout.call(null, marker);
+        } catch (e){
+            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
+            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
+            return cachedClearTimeout.call(this, marker);
+        }
+    }
+
+
+
+}
 var queue = [];
 var draining = false;
 var currentQueue;
@@ -12360,7 +12523,7 @@ function drainQueue() {
     if (draining) {
         return;
     }
-    var timeout = cachedSetTimeout(cleanUpNextTick);
+    var timeout = runTimeout(cleanUpNextTick);
     draining = true;
 
     var len = queue.length;
@@ -12377,7 +12540,7 @@ function drainQueue() {
     }
     currentQueue = null;
     draining = false;
-    cachedClearTimeout(timeout);
+    runClearTimeout(timeout);
 }
 
 process.nextTick = function (fun) {
@@ -12389,7 +12552,7 @@ process.nextTick = function (fun) {
     }
     queue.push(new Item(fun, args));
     if (queue.length === 1 && !draining) {
-        cachedSetTimeout(drainQueue, 0);
+        runTimeout(drainQueue);
     }
 };
 
@@ -12589,21 +12752,21 @@ if (debugUtil && debugUtil.debuglog) {
 }
 /*</replacement>*/
 
+var BufferList = require('./internal/streams/BufferList');
 var StringDecoder;
 
 util.inherits(Readable, Stream);
 
-var hasPrependListener = typeof EE.prototype.prependListener === 'function';
-
 function prependListener(emitter, event, fn) {
-  if (hasPrependListener) return emitter.prependListener(event, fn);
-
-  // This is a brutally ugly hack to make sure that our error handler
-  // is attached before any userland ones.  NEVER DO THIS. This is here
-  // only because this code needs to continue to work with older versions
-  // of Node.js that do not include the prependListener() method. The goal
-  // is to eventually remove this hack.
-  if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
+  if (typeof emitter.prependListener === 'function') {
+    return emitter.prependListener(event, fn);
+  } else {
+    // This is a hack to make sure that our error handler is attached before any
+    // userland ones.  NEVER DO THIS. This is here only because this code needs
+    // to continue to work with older versions of Node.js that do not include
+    // the prependListener() method. The goal is to eventually remove this hack.
+    if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
+  }
 }
 
 var Duplex;
@@ -12627,7 +12790,10 @@ function ReadableState(options, stream) {
   // cast to ints.
   this.highWaterMark = ~ ~this.highWaterMark;
 
-  this.buffer = [];
+  // A linked list is used to store data chunks instead of an array because the
+  // linked list can remove elements from the beginning faster than
+  // array.shift()
+  this.buffer = new BufferList();
   this.length = 0;
   this.pipes = null;
   this.pipesCount = 0;
@@ -12790,7 +12956,8 @@ function computeNewHighWaterMark(n) {
   if (n >= MAX_HWM) {
     n = MAX_HWM;
   } else {
-    // Get the next highest power of 2
+    // Get the next highest power of 2 to prevent increasing hwm excessively in
+    // tiny amounts
     n--;
     n |= n >>> 1;
     n |= n >>> 2;
@@ -12802,44 +12969,34 @@ function computeNewHighWaterMark(n) {
   return n;
 }
 
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
 function howMuchToRead(n, state) {
-  if (state.length === 0 && state.ended) return 0;
-
-  if (state.objectMode) return n === 0 ? 0 : 1;
-
-  if (n === null || isNaN(n)) {
-    // only flow one buffer at a time
-    if (state.flowing && state.buffer.length) return state.buffer[0].length;else return state.length;
+  if (n <= 0 || state.length === 0 && state.ended) return 0;
+  if (state.objectMode) return 1;
+  if (n !== n) {
+    // Only flow one buffer at a time
+    if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;
   }
-
-  if (n <= 0) return 0;
-
-  // If we're asking for more than the target buffer level,
-  // then raise the water mark.  Bump up to the next highest
-  // power of 2, to prevent increasing it excessively in tiny
-  // amounts.
+  // If we're asking for more than the current hwm, then raise the hwm.
   if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
-
-  // don't have that much.  return null, unless we've ended.
-  if (n > state.length) {
-    if (!state.ended) {
-      state.needReadable = true;
-      return 0;
-    } else {
-      return state.length;
-    }
+  if (n <= state.length) return n;
+  // Don't have enough
+  if (!state.ended) {
+    state.needReadable = true;
+    return 0;
   }
-
-  return n;
+  return state.length;
 }
 
 // you can override either this method, or the async _read(n) below.
 Readable.prototype.read = function (n) {
   debug('read', n);
+  n = parseInt(n, 10);
   var state = this._readableState;
   var nOrig = n;
 
-  if (typeof n !== 'number' || n > 0) state.emittedReadable = false;
+  if (n !== 0) state.emittedReadable = false;
 
   // if we're doing read(0) to trigger a readable event, but we
   // already have a bunch of data in the buffer, then just trigger
@@ -12895,9 +13052,7 @@ Readable.prototype.read = function (n) {
   if (state.ended || state.reading) {
     doRead = false;
     debug('reading or ended', doRead);
-  }
-
-  if (doRead) {
+  } else if (doRead) {
     debug('do read');
     state.reading = true;
     state.sync = true;
@@ -12906,28 +13061,29 @@ Readable.prototype.read = function (n) {
     // call internal read method
     this._read(state.highWaterMark);
     state.sync = false;
+    // If _read pushed data synchronously, then `reading` will be false,
+    // and we need to re-evaluate how much data we can return to the user.
+    if (!state.reading) n = howMuchToRead(nOrig, state);
   }
 
-  // If _read pushed data synchronously, then `reading` will be false,
-  // and we need to re-evaluate how much data we can return to the user.
-  if (doRead && !state.reading) n = howMuchToRead(nOrig, state);
-
   var ret;
   if (n > 0) ret = fromList(n, state);else ret = null;
 
   if (ret === null) {
     state.needReadable = true;
     n = 0;
+  } else {
+    state.length -= n;
   }
 
-  state.length -= n;
-
-  // If we have nothing in the buffer, then we want to know
-  // as soon as we *do* get something into the buffer.
-  if (state.length === 0 && !state.ended) state.needReadable = true;
+  if (state.length === 0) {
+    // If we have nothing in the buffer, then we want to know
+    // as soon as we *do* get something into the buffer.
+    if (!state.ended) state.needReadable = true;
 
-  // If we tried to read() past the EOF, then emit end on the next tick.
-  if (nOrig !== n && state.ended && state.length === 0) endReadable(this);
+    // If we tried to read() past the EOF, then emit end on the next tick.
+    if (nOrig !== n && state.ended) endReadable(this);
+  }
 
   if (ret !== null) this.emit('data', ret);
 
@@ -13075,11 +13231,17 @@ Readable.prototype.pipe = function (dest, pipeOpts) {
     if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();
   }
 
+  // If the user pushes more data while we're writing to dest then we'll end up
+  // in ondata again. However, we only want to increase awaitDrain once because
+  // dest will only emit one 'drain' event for the multiple writes.
+  // => Introduce a guard on increasing awaitDrain.
+  var increasedAwaitDrain = false;
   src.on('data', ondata);
   function ondata(chunk) {
     debug('ondata');
+    increasedAwaitDrain = false;
     var ret = dest.write(chunk);
-    if (false === ret) {
+    if (false === ret && !increasedAwaitDrain) {
       // If the user unpiped during `dest.write()`, it is possible
       // to get stuck in a permanently paused state if that write
       // also returned false.
@@ -13087,6 +13249,7 @@ Readable.prototype.pipe = function (dest, pipeOpts) {
       if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {
         debug('false write response, pause', src._readableState.awaitDrain);
         src._readableState.awaitDrain++;
+        increasedAwaitDrain = true;
       }
       src.pause();
     }
@@ -13200,18 +13363,14 @@ Readable.prototype.unpipe = function (dest) {
 Readable.prototype.on = function (ev, fn) {
   var res = Stream.prototype.on.call(this, ev, fn);
 
-  // If listening to data, and it has not explicitly been paused,
-  // then call resume to start the flow of data on the next tick.
-  if (ev === 'data' && false !== this._readableState.flowing) {
-    this.resume();
-  }
-
-  if (ev === 'readable' && !this._readableState.endEmitted) {
+  if (ev === 'data') {
+    // Start flowing on next tick if stream isn't explicitly paused
+    if (this._readableState.flowing !== false) this.resume();
+  } else if (ev === 'readable') {
     var state = this._readableState;
-    if (!state.readableListening) {
-      state.readableListening = true;
+    if (!state.endEmitted && !state.readableListening) {
+      state.readableListening = state.needReadable = true;
       state.emittedReadable = false;
-      state.needReadable = true;
       if (!state.reading) {
         processNextTick(nReadingNextTick, this);
       } else if (state.length) {
@@ -13255,6 +13414,7 @@ function resume_(stream, state) {
   }
 
   state.resumeScheduled = false;
+  state.awaitDrain = 0;
   stream.emit('resume');
   flow(stream);
   if (state.flowing && !state.reading) stream.read(0);
@@ -13273,11 +13433,7 @@ Readable.prototype.pause = function () {
 function flow(stream) {
   var state = stream._readableState;
   debug('flow', state.flowing);
-  if (state.flowing) {
-    do {
-      var chunk = stream.read();
-    } while (null !== chunk && state.flowing);
-  }
+  while (state.flowing && stream.read() !== null) {}
 }
 
 // wrap an old-style stream as the async data source.
@@ -13348,50 +13504,101 @@ Readable._fromList = fromList;
 
 // Pluck off n bytes from an array of buffers.
 // Length is the combined lengths of all the buffers in the list.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
 function fromList(n, state) {
-  var list = state.buffer;
-  var length = state.length;
-  var stringMode = !!state.decoder;
-  var objectMode = !!state.objectMode;
-  var ret;
-
-  // nothing in the list, definitely empty.
-  if (list.length === 0) return null;
+  // nothing buffered
+  if (state.length === 0) return null;
 
-  if (length === 0) ret = null;else if (objectMode) ret = list.shift();else if (!n || n >= length) {
-    // read it all, truncate the array.
-    if (stringMode) ret = list.join('');else if (list.length === 1) ret = list[0];else ret = Buffer.concat(list, length);
-    list.length = 0;
+  var ret;
+  if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {
+    // read it all, truncate the list
+    if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.head.data;else ret = state.buffer.concat(state.length);
+    state.buffer.clear();
   } else {
-    // read just some of it.
-    if (n < list[0].length) {
-      // just take a part of the first list item.
-      // slice is the same for buffers and strings.
-      var buf = list[0];
-      ret = buf.slice(0, n);
-      list[0] = buf.slice(n);
-    } else if (n === list[0].length) {
-      // first list is a perfect match
-      ret = list.shift();
-    } else {
-      // complex case.
-      // we have enough to cover it, but it spans past the first buffer.
-      if (stringMode) ret = '';else ret = bufferShim.allocUnsafe(n);
-
-      var c = 0;
-      for (var i = 0, l = list.length; i < l && c < n; i++) {
-        var _buf = list[0];
-        var cpy = Math.min(n - c, _buf.length);
+    // read part of list
+    ret = fromListPartial(n, state.buffer, state.decoder);
+  }
 
-        if (stringMode) ret += _buf.slice(0, cpy);else _buf.copy(ret, c, 0, cpy);
+  return ret;
+}
 
-        if (cpy < _buf.length) list[0] = _buf.slice(cpy);else list.shift();
+// Extracts only enough buffered data to satisfy the amount requested.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function fromListPartial(n, list, hasStrings) {
+  var ret;
+  if (n < list.head.data.length) {
+    // slice is the same for buffers and strings
+    ret = list.head.data.slice(0, n);
+    list.head.data = list.head.data.slice(n);
+  } else if (n === list.head.data.length) {
+    // first chunk is a perfect match
+    ret = list.shift();
+  } else {
+    // result spans more than one buffer
+    ret = hasStrings ? copyFromBufferString(n, list) : copyFromBuffer(n, list);
+  }
+  return ret;
+}
 
-        c += cpy;
+// Copies a specified amount of characters from the list of buffered data
+// chunks.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function copyFromBufferString(n, list) {
+  var p = list.head;
+  var c = 1;
+  var ret = p.data;
+  n -= ret.length;
+  while (p = p.next) {
+    var str = p.data;
+    var nb = n > str.length ? str.length : n;
+    if (nb === str.length) ret += str;else ret += str.slice(0, n);
+    n -= nb;
+    if (n === 0) {
+      if (nb === str.length) {
+        ++c;
+        if (p.next) list.head = p.next;else list.head = list.tail = null;
+      } else {
+        list.head = p;
+        p.data = str.slice(nb);
       }
+      break;
     }
+    ++c;
   }
+  list.length -= c;
+  return ret;
+}
 
+// Copies a specified amount of bytes from the list of buffered data chunks.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function copyFromBuffer(n, list) {
+  var ret = bufferShim.allocUnsafe(n);
+  var p = list.head;
+  var c = 1;
+  p.data.copy(ret);
+  n -= p.data.length;
+  while (p = p.next) {
+    var buf = p.data;
+    var nb = n > buf.length ? buf.length : n;
+    buf.copy(ret, ret.length - n, 0, nb);
+    n -= nb;
+    if (n === 0) {
+      if (nb === buf.length) {
+        ++c;
+        if (p.next) list.head = p.next;else list.head = list.tail = null;
+      } else {
+        list.head = p;
+        p.data = buf.slice(nb);
+      }
+      break;
+    }
+    ++c;
+  }
+  list.length -= c;
   return ret;
 }
 
@@ -13430,7 +13637,7 @@ function indexOf(xs, x) {
   return -1;
 }
 }).call(this,require('_process'))
-},{"./_stream_duplex":69,"_process":67,"buffer":44,"buffer-shims":43,"core-util-is":45,"events":48,"inherits":51,"isarray":53,"process-nextick-args":66,"string_decoder/":79,"util":40}],72:[function(require,module,exports){
+},{"./_stream_duplex":69,"./internal/streams/BufferList":74,"_process":67,"buffer":44,"buffer-shims":43,"core-util-is":45,"events":48,"inherits":51,"isarray":53,"process-nextick-args":66,"string_decoder/":80,"util":40}],72:[function(require,module,exports){
 // a transform stream is a readable/writable stream where you do
 // something with the data.  Sometimes it's called a "filter",
 // but that's not a great name for it, since that implies a thing where
@@ -14140,10 +14347,75 @@ function CorkedRequest(state) {
   };
 }
 }).call(this,require('_process'))
-},{"./_stream_duplex":69,"_process":67,"buffer":44,"buffer-shims":43,"core-util-is":45,"events":48,"inherits":51,"process-nextick-args":66,"util-deprecate":80}],74:[function(require,module,exports){
+},{"./_stream_duplex":69,"_process":67,"buffer":44,"buffer-shims":43,"core-util-is":45,"events":48,"inherits":51,"process-nextick-args":66,"util-deprecate":81}],74:[function(require,module,exports){
+'use strict';
+
+var Buffer = require('buffer').Buffer;
+/*<replacement>*/
+var bufferShim = require('buffer-shims');
+/*</replacement>*/
+
+module.exports = BufferList;
+
+function BufferList() {
+  this.head = null;
+  this.tail = null;
+  this.length = 0;
+}
+
+BufferList.prototype.push = function (v) {
+  var entry = { data: v, next: null };
+  if (this.length > 0) this.tail.next = entry;else this.head = entry;
+  this.tail = entry;
+  ++this.length;
+};
+
+BufferList.prototype.unshift = function (v) {
+  var entry = { data: v, next: this.head };
+  if (this.length === 0) this.tail = entry;
+  this.head = entry;
+  ++this.length;
+};
+
+BufferList.prototype.shift = function () {
+  if (this.length === 0) return;
+  var ret = this.head.data;
+  if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
+  --this.length;
+  return ret;
+};
+
+BufferList.prototype.clear = function () {
+  this.head = this.tail = null;
+  this.length = 0;
+};
+
+BufferList.prototype.join = function (s) {
+  if (this.length === 0) return '';
+  var p = this.head;
+  var ret = '' + p.data;
+  while (p = p.next) {
+    ret += s + p.data;
+  }return ret;
+};
+
+BufferList.prototype.concat = function (n) {
+  if (this.length === 0) return bufferShim.alloc(0);
+  if (this.length === 1) return this.head.data;
+  var ret = bufferShim.allocUnsafe(n >>> 0);
+  var p = this.head;
+  var i = 0;
+  while (p) {
+    p.data.copy(ret, i);
+    i += p.data.length;
+    p = p.next;
+  }
+  return ret;
+};
+},{"buffer":44,"buffer-shims":43}],75:[function(require,module,exports){
 module.exports = require("./lib/_stream_passthrough.js")
 
-},{"./lib/_stream_passthrough.js":70}],75:[function(require,module,exports){
+},{"./lib/_stream_passthrough.js":70}],76:[function(require,module,exports){
 (function (process){
 var Stream = (function (){
   try {
@@ -14163,13 +14435,13 @@ if (!process.browser && process.env.READABLE_STREAM === 'disable' && Stream) {
 }
 
 }).call(this,require('_process'))
-},{"./lib/_stream_duplex.js":69,"./lib/_stream_passthrough.js":70,"./lib/_stream_readable.js":71,"./lib/_stream_transform.js":72,"./lib/_stream_writable.js":73,"_process":67}],76:[function(require,module,exports){
+},{"./lib/_stream_duplex.js":69,"./lib/_stream_passthrough.js":70,"./lib/_stream_readable.js":71,"./lib/_stream_transform.js":72,"./lib/_stream_writable.js":73,"_process":67}],77:[function(require,module,exports){
 module.exports = require("./lib/_stream_transform.js")
 
-},{"./lib/_stream_transform.js":72}],77:[function(require,module,exports){
+},{"./lib/_stream_transform.js":72}],78:[function(require,module,exports){
 module.exports = require("./lib/_stream_writable.js")
 
-},{"./lib/_stream_writable.js":73}],78:[function(require,module,exports){
+},{"./lib/_stream_writable.js":73}],79:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -14298,7 +14570,7 @@ Stream.prototype.pipe = function(dest, options) {
   return dest;
 };
 
-},{"events":48,"inherits":51,"readable-stream/duplex.js":68,"readable-stream/passthrough.js":74,"readable-stream/readable.js":75,"readable-stream/transform.js":76,"readable-stream/writable.js":77}],79:[function(require,module,exports){
+},{"events":48,"inherits":51,"readable-stream/duplex.js":68,"readable-stream/passthrough.js":75,"readable-stream/readable.js":76,"readable-stream/transform.js":77,"readable-stream/writable.js":78}],80:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -14521,7 +14793,7 @@ function base64DetectIncompleteChar(buffer) {
   this.charLength = this.charReceived ? 3 : 0;
 }
 
-},{"buffer":44}],80:[function(require,module,exports){
+},{"buffer":44}],81:[function(require,module,exports){
 (function (global){
 
 /**
@@ -14592,14 +14864,16 @@ function config (name) {
 }
 
 }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{}],81:[function(require,module,exports){
+},{}],82:[function(require,module,exports){
+arguments[4][51][0].apply(exports,arguments)
+},{"dup":51}],83:[function(require,module,exports){
 module.exports = function isBuffer(arg) {
   return arg && typeof arg === 'object'
     && typeof arg.copy === 'function'
     && typeof arg.fill === 'function'
     && typeof arg.readUInt8 === 'function';
 }
-},{}],82:[function(require,module,exports){
+},{}],84:[function(require,module,exports){
 (function (process,global){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -15189,4 +15463,4 @@ function hasOwnProperty(obj, prop) {
 }
 
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./support/isBuffer":81,"_process":67,"inherits":51}]},{},[1]);
+},{"./support/isBuffer":83,"_process":67,"inherits":82}]},{},[1]);