OSMF SVN

Fix FM-262: Add checkPolicyFile param to SoundLoader, to enable use of SoundMixer.computeSpectrum and Sound.id3. API to be reviewed by PARB.

Fix FM-60: MediaPlayer.load swallows exceptions. The fix is to convert exceptions into MediaErrorEvents with the details of the failure. This approach is preferred over throwing an exception, because this is an error which doesn't strictly qualify as a programming error (e.g. the exception may be due to passing an resource to a MediaElement that doesn't handle it, and the MediaPlayer client may just be acting as a pass-through). Updated unit tests and ExamplePlayer with another failure sample.

FM-531 FastTrack. Rest of pending MediaEvent work.

Fix FM-242: Modify canSeekTo to return false if the target bytes haven't been downloaded yet.

Fix FM-440: Don't expose the SeekTrait for video until the video has a duration.

Removal events unit tests. Fixed issue w/ autoSwitch.

Clean up and expose MediaErrorCodes. Add ASDocs for each, in preparation for PARB review.

Fix RTE when accessing VideoElement.client before the video has been loaded.

Updated event generation to dispatch when duration changes to 0. FM-277.

MediaPlayer event generation. Unit tests for event generation. DynamicDynamicStreamTrait.