OSMF SVN

Integrate refactored load trait, merged with deprecated download trait. Update unit tests.

Refactor and integrate some additional composite trait unit tests.

Integrate refactored composite seek trait. Update unit tests.

Integrate refactored composite TimeTrait. Update unit tests.

Add composite trait unit test for when the canPause state of a child trait changes.

Reintegrate IReusable into composite traits. Remove IDisposable, the dispose method can now live on MediaTraitBase. Make composite IReusable symmetric (i.e. don't depend on dispose() for removing TraitAggregator listeners).

Integrate refactored composite PlayTrait. Update and expand unit tests.

Internalizing parser until the format is final.

Removed log message that was breaking build.

Asdocs build fix: Replace "<" and ">" characters in asdocs comments with "<" and ">"