- Default debug level is now 0 (was 3). Override with "debug" module param.
- Fixed incorrect /proc reporting of OV6620.
- Snapshot mode now works with mmap().
- Added experimental control file interface. Uses /dev/vtx?. Not useful yet,
  broken, and disabled by default
- video_register_device() return code check would only detect fail if -1
- ov511.txt: Updated.