OSMF SVN

Commit of traits refactored as classes instead of interfaces. A trait now has a public API for clients, and a protected API that implementors can use to hook into the workflow. Lots of additional changes:
* Merge spatial and viewable traits
* Merge load and download traits
* Merge play and pause traits
* Refactor MediaTraitType to hold strings (consistent with PARB)

Note that the composition layer is currently disabled (CompositeElements only support the Audio and Buffer traits). There may also be some bugs in the area of HTML support.

reverse tagging changes until Brian's submissions are complete

Updated example player.

Updated with manifest code review feedback. Added Default media factory. Updated unit tests

Code cleanup and changes after code review.

Change tagging from AIR 1.0 to AIR 1.5

Fix tagging for asdocs filtering

A few code cleanup and optimization tasks for the Manifest.

Fix bug FM-257: Rename durationReached event type to complete. Also, updated unit tests to be in sync with latest changes (including loc work).

Initial check in of the captioning plug test app.