HLSProviderFlowPlayer.swf : shrink size (140kB => 35 kB)
by removing useless classes
remove BUFFERING state
replace it by PLAYING_BUFFERING and PAUSED_BUFFERING state
adapt internal logic and providers accordingly

all providers are still working correctly after these changes.
in particular, seek in play/pause mode has been rechecked
HLSProviderFlowPlayer.swf

autostart:true/false working
play/pause/seek working
volume control working
related to https://github.com/mangui/HLSprovider/issues/89