OSMF SVN

Integration of Sprint 5 features
- rolling window
- create Video Element from XML representation of manifest (not from external url)
- support for multi-level manifest files
- late-binding audio on HDS

( change lists 2142 - 2150)

Severity : IMPORTANT
- major refactorings in f4m classes and httpstreaming
- unit tests and integration tests added and updated

updated tests for f4m

[F4M Conviva Branch]
- fixed bug injected in previous commit (Stack Overflow)

[F4M-Conviva branch]
Cleaned-up the code (new class added: ManifestLoaderBase)

integrartion and unit tests for f4m

[Conviva branch]
- Added some other forgotten files

[Multi level manifest branch]
- adding some files I forgot to add at the last commit (I only submitted the modified files, forgot to add the new, unversioned files)

[Conviva branch]
- adding some files I forgot to add before

[f4m-conviva branch]
- early prototype with the new StreamingXMLResource

Created branch for Conviva request.
This was branched from the multi-level-manifest branch and not from the main trunk, because it's related to the F4MLoader, which was affected by MLM.