OSMF SVN

Updates to error codes after PARB review.

Fix FM-434: MBR streams not sorted in manifest parser.

Fix FM-601: Remove empty test case.

Add f4f unit tests, more to come.

Updated DRM urls to point to newer DRM server.

Updates to various error codes.

Reverting FMTA work, to url parameter passing, instead of connect() arg passing, per Gaurav's advice.

PARB changes: Rename BasicVideoElement to LightweightVideoElement.

Revert currentChildIndex changes, expose currentChild instead. Turns out it's trivial to get from currentChild to the index (CompositeElement.getChildIndex), and the API review board felt that currentChild is clearer and more useful.

Implement a better http streaming unit testing structure.