OSMF SVN

PARB changes: Move all MediaElement subclasses into the "elements" package. Put internal classes into non-public subfolders (e.g. audioClasses). Update unit tests and sample apps. Remove VAST unit tests from OSMFTest, we should integrate VASTTest into the build system.

PARB changes: Rename PluginLoadEvent to PluginManagerEvent.

PARB changes: Refactor MediaFactory and Loader classes:
- MediaInfo becomes MediaFactoryItem. All MediaFactory and plugin-related APIs are updated accordingly. The rule of thumb is to use "item" on MediaFactory, and "mediaFactoryItem" on the plugin classes (since the former are already qualified, whereas the latter are not).
- Remove IMediaResourceHandler. Add canHandleResource to LoaderBase. Make handler function a Function to pass to MediaFactoryItem's constructor.
- Merge resolver interfaces/classes into MediaFactoryItemResolver, which defaults to selecting the first one.
- Make LoaderBase load/unload methods final. Add protected methods to execute the load, so that we can ensure validation takes place first.
- Update all unit tests and sample apps accordingly.

Adding SMILPlugin to the AkamaiPluginSample rather than creating a new sample app.

Update references to MediaPlayerWrapper.

IMediaResource - > MediaResourceBase.
IURLResource -> Gone.

PARB changes: Modify MediaPlayer API based on PARB feedback. Change "durationReached" event to "complete". Update unit tests and sample apps.

Updating AkamaiPluginSample and CuePointSample to the latest API changes.

PARB changes: Refactor MediaError to use Error as a subclass. Update unit tests and sample apps.

PARB refactoring: Rename ViewTrait's dimension properties.