[theora] QTheoraFrontend

[Jason Self]

Denver Gingerich has put together a quick frontend for ffmpeg2theora.
It's written in Qt, so will run on OS X, Windows, and X11. You can
find it here:

http://github.com/ossguy/qtheorafrontend

It doesn't do any sort of error checking right now, and currently
assumes the video file is in the current directory and called
"test.flv". It will convert the file, showing ffmpeg2theora's status
in the UI. Work is ongoing to polish it up & add more features.

(Patches are happily accepted, BTW.)