OSMF SVN

Reorg of dynamic streaming classes. Separate RTMP rules from core MBR classes by placing them in an "rtmpstreaming" package. Allow clients to add switching rules to NetStreamSwitchManager via the constructor. Initialize switching manager differently for RTMP and HTTP. Still an open question as to whether we should keep DynamicStreamingNetLoader (or subsume it into NetLoader).

Remainder of fix for FM-383: Ensure that when SerialElement (via TraitLoader) attempts to load the next playable child (on child transitions), it takes into account the possibility that the LoadTrait of a child that it's loading will be replaced by another LoadTrait (which would then become the one it needs to load). Also updated the CaptioningProxyElement to use a higher listener priority so that it ensures that the SerialElement doesn't think that the load is complete when transitioning from child to child. (This is a necessary step for clients who use the swapping LoadTrait trick, but there might be a more robust approach to the same problem.)

Partial fix for FM-383: ProxyElement needs to dispatch traitRemove/traitAdd event pairs when the proxy adds or removes a trait that also exists on the proxied element.

Sync with latest layout API changes.

PARB feedback: rename LayoutProperties to LayoutRendererProperties.

PARB feedback: rename LayoutRenderer to LayoutRendererBase, rename DefaultLayoutRenderer to LayoutRenderer.

Updating source path to control bar plugin.

Moving ControlBarPluginSample and Test into the plug-ins folder.

PARB feedback: taking out 'media' references; renaming measureMedia to measure, and updateMediaDisplay to layout.

PARB feedback: updating sample to use measureWidth and height.