Disable config options in ffmpeg I don't believe we use
More care with determining audio fifo fullness
Fix warning
Fix setting dest rect. Allow negative coordinates
Fix for audio only files not starting
Fix for pause not working
Experimental support for seeking in http files. Thanks Naren
Print warning if gpu_mem is not sufficient
Add option to blank the background of the video.

Note: this is less efficient than clearing it with -r and restoring with fbset
Fix typo in http seeking commit
Update help & readme, -b is no longer --threshold.