OSMF SVN

Eliminate compiler warning related to log statement.

Fix ExamplePlayer UI for Flex 3.0.

Fix FM-990: Loading images always requests a crossdomain file. The fix is to add a "checkPolicyFile" param to ImageLoader's constructor, with a default of true. To avoid the crossdomain request, just set this param to false. The downside of setting it to false is that you'll get a security error if the application attempts pixel-level access of the image.

Add PreloadingProxyElement to ExamplePlayer, to demonstrate how a proxy can preload a VideoElement within a SerialElement and make it seekable prior to the playhead reaching that child of the SerialElement. Helps demonstrate a solution for the issue raised in FM-952, in which it's not possible to seek across subclips within a SerialElement. Modified existing AsynchLoadingProxyElement so that it could serve as a base class for the new proxy.

Fix FM-1014: AudioeElement does not play m4a over http.

Fix FM-953: MediaPlayer lacks method to expose DVR recording state. Add unit tests. Also fix missing clone call on DVREvent.

Fix for FM-983

Additional fix for FM-949: Make timer event listeners weak listeners.

Fix FM-937: ProxyElement dispatches trait events for blocked and overridden traits. Add unit test.

Fix for FM-1020