OSMF SVN

PARB changes: Remove PluginManager, move loadPlugin method to MediaFactory. Add MediaFactoryEvent for determining when plugins are loaded. Add event type for creation of MediaElements. Update samples and unit tests.

Restoring correct set of actionScriptProperties.

DVR: labeling lastRecordingTime @private for now.

DVR: Extending unit tests.

DVR: Extending stream info retriever unit tests.

PARB changes: removing MediaPlayer.playMode and related classes. Renaming livePosition to lastRecordedTime.

Fix unit test.

PARB changes: Rename DRMEvent's error to mediaError to be consistent with other trait event classes.

Remove duplicate event metadata.

PARB changes: Remove reason property from switching rules and dynamic streaming trait. Should be exposed via logging statements.