OSMF SVN

Extending unit tests.

Adding a null check, and using a TestableResponder instead of a regular Responder object to subscribe to a DVRCast stream.

Fixing FM-788.

Submit a change missed.

1. Change DVRInfo from package org.osmf.elements.f4mClasses to package org.osmf.net.httpstreaming.dvr
2. Fix a problem with DVR start time calculation

Fix FM-598: SMIL plugin ignores switch in seq tags.

Fix for 786. Allows content to begin playback if beginning is unencrypted.

Fixing 'autoHideControlBar' FlashVar being ignored.

FM-9 note update format

Fix extensibility of NetLoader related to supporting additional protocols (future proofing). The problem was that NetLoader.executeLoad assumed that the load would get added to its internal pending load list, but subclasses won't have access to this. The fix is to not assume this, and rely on the subclass to manage the event flow from the NetConnectionFactory.