OSMF SVN

Mark synthesizer API as @private.

Removed empty plugin directory.

Apply default layout metadata to ExamplePlayer. Update layout metadata for specific examples now that we're using the default MediaContainer.

Apply layout to the HelloWorld samples.

Fix bug where parsing of stream that gets passed to NetStream.play doesn't take urlIncludesFMSApplicationInstance into account, resulting in stream not found error.

Fix for FM-463 (DVR: Video doesn't resume playing after record is resume).

Fix for FM-477 (DVR: Negative duration when publishing a new video with endoffsset value).

Fix FM-500: reinstating onMetaData handler clause that prevents incoming dimensions from being applied if they are not different from the dimensions that were already set.

Metadata refactoring revision: removing clause that manually copied layout data from a composite media element onto its inner layout target sprite. Instead, passing the media element's layout metadata as the layout target sprite's constructor, so that both use the same instance, making sure that mutations on the instance reach the layout target sprite.

NOTE that as a result of the new metadata approach, the user can be overriding the set layoutMetadata instance on media element. When this happens, the inner layout target sprite will no longer be pointing to the correct layout metadata instance. Fixing this requires changing layoutTargetSprite to be capable of dealing with a variable layoutMetadata instance (for right now the class assumes the instance to be static, either passed in at construction time, or constructed by the class itself at that time).

Metadata refactoring revision: having LayoutMetadata return a NullMetadataSynthesizer so that child layout settings do not get copied to their parent.