Begin adding threaded video driver wrapper.
Add more interfaces to threaded driver.
Start adding overlay interface.
Overlay works in thread_video.
Add video_threaded option to Android.
Clarify in alert a bit. Make threaded mode non-default.
Merge branch 'master' of github.com:Themaister/RetroArch into thread_video

Conflicts:
	android/native/jni/Android.mk
	console/griffin/griffin.c
Merge branch 'master' into thread_video
Merge branch 'master' into thread_video

Conflicts:
	console/griffin/griffin.c
Merge branch 'master' into thread_video
Fix so that threaded video is not enabled by default.
Merge branch 'master' into thread_video
Fix threaded driver build on Win32.
Merge pull request #139 from Themaister/thread_video

Threaded video driver