Got the camera widget saving an .avi

Improvements needed are:
* Don't save forever, add start_vid_rec and stop_vid_rec functions.
* Fix the super-speed issue.
* Consider .mp4 instead of .avi

If I can't fix those I'll probably need to make it dump to a FIFO
forever then use Mplayer, VLC, or something to do the video recording
from that.