OSMF SVN

Pre-PARB metadata changes: More ASDoc cleanup.

Pre-PARB metadata changes: Rename TemporalFacetEvent's positionReached property to timeReached.

Pre-PARB metadata changes: Clean up the MetadataNamespace public APIs, hide some internal namespaces. Hide a few other internal APIs.

Fixed injection due to MediaErrorCodes being re arranged.

ChromeLibrary: fixing hints from appearing at the wrong vertical offset, and preventing scrub bar time remaining calculations to go negative.

DVR: extending MediaPlayer to support DVRTrait, and adding more docs.

DVR: adding composite support.

DVR: adding ExcludeClass metadata tag.

DVR: extending implementation details. Extending NetLoader with a time trait factory function, adding a timeTrait property to NetStreamLoadTrait, and having VideoElement use the new property on adding element traits.

Adding 'LocalFacet', removing 'LayoutFacet', and changing layout facets to inherit from LocalFacet.

Pre-PARB metadata changes: Remove ObjectFacet, Facet can be used instead.