remove unused import
introduce StreamProvider interface and move all existing NetStream logic from Flowplayer.as into NetStreamProvider.as

Conflicts:
	lib/as/Flowplayer.as
Flowplayer.as : choose provider based on URL extension
implement HLSStreamProvider skeleton
link FlowPlayer/AS with flashls.swc (v0.3.3/debug)
generate 2 swfs, flowplayer.swf/flowplayerhls.swf
checked with swfdump: HLSStreamProvider is only available in flowplayerhls.swf
factorize debug() calls
basic HLS playback support
update to flashls v0.3.4/debug
clean-up "make flash"
fix HLS video aspect ratio, in windowed/full screen mode
handle unload/seek events
less verbose debug logs
fire finish event and handle loop mode
remove debug compile option to save some space
fix video not centered when resizing player
handle error events
merge flash bugfix from 5.5.2
rollback flex compiler path
Merge branch 'feature/v6-hls' into feature/v6