OSMF SVN

Fix bug FM-175 to increase the code coverage for class ListenerProxyElement.

Fix broken integration test. Make more general to support subclasses with different download sizes.

Changes after code review.

Removing extLibs as library paths for test projects. Not sure how they got there.

Adding unit tests for ContentDownloadableTrait.

Removing 'libs' as a library path from the Flex Builder project properties.

PARB feedback: Consolidate/rename MediaPlayerState enumeration:
* CONSTRUCTED -> UNINITIALIZED
* INITIALIZED -> READY
* SEEKING -> BUFFERING (since any delay caused by a seek is due to the need to buffer data)

Moved the VideoElement DRM specific tests into the 10.1 block.

updated the unit tests for the DRM subsystem. Still lacking tests for Authentication Token.

PARB feedback: Add MediaPlayer.stop method. Rename MediaPlayer.source to MediaPlayer.element.