0.5.0

• Remove data.persistence.request.Batch class. No longer used.
• Add new OperationDeferred class, and use it to clean up Operation class a bit.
• Allow users to attach 'progress' handlers to Operation objects, to be notified of requests within the Operation being completed.
• Add the ability for Proxies to notify of progress for a given Request.
• Consolidate proxy handling for DataComponents (Models and Collections) into the DataComponent class.
• Update Lo-Dash to 2.4.0

0.4.0

New Features:

• Add 'loadsuccess' and 'loaderror' events to Collection.
• Add getIncompleteRequests() method to data.persistence.operation.Operation
• Change Request's setException() method to setError(), and getException() to getError().
• Add abort() method to Proxy, to allow subclasses to add any proxy-specific implementation.
• AjaxProxy (data.persistence.proxy.Ajax) now aborts individual XHR requests when an Operation is aborted ('load', 'save', etc).
• Operation now takes care of setting Requests' success or error states, instead of leaving Proxies to do it. Proxies now resolve their Promise with a ResultSet (if needed), and reject their Promise with an error object or string.

Bug Fixes:

• Fix an issue with Model saving related models/collections, where its 'saveerror' event wouldn't be fired if a related model/collection failed to save/synchronize.

0.3.1

• Fix scope for callbacks provided to Model.save() and Model.destroy().

0.3.0

• Add Memory proxy
• Add ignoreUnknownAttrs option to be passed to the Model constructor
• Change Model's ignoreUnknownAttrs config to ignoreUnknownAttrsOnLoad
• Add ignoreUnknownAttrsOnLoad config to Collection.
• Model's load(), save(), and destroy() methods now return an OperationPromise object instead of a raw jQuery.Deferred, allowing cancel() handlers to be attached, and the ability to abort operations. Each method now also accepts a 'cancel' callback function option as well.
• Add 'loadsuccess', 'loaderror', 'loadcancel', 'savesuccess', 'saveerror', 'savecancel', 'destroysuccess', 'destroyerror', and 'destroycancel' events to Model, for individual event subscriptions.
• Model's 'load', 'save', and 'destroy' events now fire if their corresponding operations are aborted. This is to maintain the "catch-all" property of these events, and to make these events consistent with the 'complete' callbacks and 'always' handlers that can be attached to the returned promise.
• Model's load(), save(), and destroy() methods' promises are now resolved/rejected with the arguments: [model, operation] instead of [model, request].
• Change Operation.wasCanceled() to Operation.wasAborted()
• Remove 'action' parameter from Ajax proxy's buildParams() method
• Model now reads back any server-returned (i.e. proxy-returned) data from a save operation, in order to update the Model with server state.

0.2.3

• Doc fix in persistence/operation/Promise.js

0.2.2

• Ignore vendor/ directory for Bower

0.2.1

• Update Lo-Dash to 2.2.1

0.2.0

• Add state() and progress() methods to data.persistence.operation.Operation and data.persistence.operation.Promise, to make them fully
  compatible with jQuery's Promise interface. This allows the use of jQuery.when() on multiple OperationPromises.

0.1.2

• Update bower.json for latest version numbers on Class.js and Observable.js dependencies.

0.1.1

• Fix a few doc bugs.