OSMF SVN

PARB changes: making add, remove and contains methods public on the ASDocs. Refraining from adding shielding for adding custom display objects to the sprite, for a LayoutRenderer must be capable of doing so.

PARB changes: LayoutRendererProperties, remove "ment" from horizontal- and verticalAligment. Set MIDDLE constant to "middle". Updating unit tests and client code accordingly.

PARB changes: make measuredWidth and height, displayObject, measure and layout public on ASDocs.

PARB changes: mark events @private, remove LayoutRenderer mentionings on layout and measure routines.

PARB changes: Remove ILoadedContext, use LoadTrait subclasses to hold media-specific objects.

Fix for FM-347

Fixed a bug in DynamicStreamingSample that Ivonne found.

Adding class level ASDocs.

Adding class level ASDocs.

PARB changes: Move DRMState and DRMAuthenticationMethod to org.osmf.traits package, since they're generic. Move other DRM classes into org.osmf.net.drm package.