OSMF SVN

Fix bug FM-373: SerialElements can't seek if certain children are unseekable. Updated RTMPPosterFrameElement to use a ProxyElement-based approach with blocked traits (much simpler and more robust).

Make this class private such that it does not show up in the ASDcos.

First check in of DVR support.

Better fix for FM-530. Instead of relying on the Play.PublishNotify event (which won't get dispatched for streams that are already published) to enter the playing state, check the bufferTime value and immediately exit buffering mode if it's zero. In that case (which seems to only happen with live), the Play.Start event is the last one we'll get, so we can't rely on a Buffer.Full event (which makes sense if bufferTime is zero).

Modify LoadFromDocumentElement so that it doesn't use a custom event to signal loaded.

Temporarily disable test of fragment run table.

Fix bug FM-520 and FM-521

Fix inconsistent MediaPlayerState transitions. In general, media should transition from UNINITIALIZED to LOADING to READY to BUFFERING (if canBuffer) to PLAYING. For error conditions, media should transition from LOADING to PLAYBACK_ERROR. Added additional error cases to ExamplePlayer. Update unit tests to verify these states for all media types.

Integrate fixes for FM-255, FM-500, FM-531, and FM-532.

Created branch sprint10-532.