Merge pull request #317 from mbebenita/master

Youtube fixes.
Playback example with FLVPlayback component
Stubs scale9Grid
Wait for the frame to be executed before displatching 'complete'
Misc stubs: accessibility, SoundTransform, videoHeight, etc.
Simulates some "invokes" for NetStream and NetConnection
Fixes target when event is cloned
Merge pull request #319 from yurydelendik/melons

Misc fixes to get FLVPlayback started
Handling empty (204) requests
Misc screen capabilities
Merge pull request #320 from yurydelendik/yt-noresponse

Handling noresponse HTTP requests; screen caps
Refactor sanity tests, moved them to test/