add support for android-19 immersive mode
Merge pull request #175 from kasoki/android_immersive_mode

Add support for Android immersive mode
graphics.drawTriangles no longer sets viewport
take out the flat value all together

I think this is the best way to do it. Since the faulty flat values on OUYA only broke OpenFL games, suggests to me that Unity, Mono, Java etc... all handle their own deadzones, regardless of the flat value.
Merge pull request #176 from joonjoonjoon/patch-1

take out the flat value all together
Remove bitmapDat.setAlphaMode
Do not poll events when application is closing
Updates for pre-multiplied alpha
Try a new Android timing scheme (thanks Hugh)
Do not overdo the adding of timers when render is pending (thanks Hugh)
remove dead code and improve immersive mode (will only occur when user wants fullscreen)