OSMF SVN

Updating MediaPlayerWrapper to the latest API changes.

Updating ExamplePlayer to work with the latest API changes.

PARB changes: Rename ViewTrait to DisplayObjectTrait, rename view property to displayObject property, and rename ViewEvent to DisplayObjectEvent. Renaming trait implementing classes accordingly, and updating framework client code and unit tests.

Updating quality control buttons to the latest DynamicStreamTrait changes.

PARB changes: Refactor DynamicStreamTrait. Rename SwitchEvent to DynamicStreamEvent. Update unit tests and MBR sample app.

Committing additional ChromeLibrary work:

- 'pin' glyphs (up and down),
- optional 'hide on mouse leave' control bar functionality,
- rudimentary support for hints.

PARB changes: Rename trait protected API to use xxxChangeStart and xxxChangeEnd pattern.

Remove unused test helper classes.

PARB changes: Refactor MediaError to use Error as a subclass. Update unit tests and sample apps.

Attempting to fix reported SVN trouble: re-adding ControlBar.as