- Renamed dump_regs parameter to separate dump_bridge and dump_sensor params.
  This is because dump_regs was causing a name conflict on PPC.
- 176x144 modeline fixed. There is still a black band on the right side of the
  image, which may be caused by the image decoding code.
- Modified sensor window setup code to center the window correctly.
- Added OV511/OV511+ decompression code. Does not work reliably yet (only works
  if image is very dark). Only works with RGB24, RGB565, and YUY420P color so
  far.
- Added ov511_yuv420p_to_rgb(), for processing output of decompressor.
- Added compressed frame detection to ov511_mode_data() (not used yet).
- Added detection for OV76BE sensor (was detected as OV7620AE previously).
- Disabled unsafe OV6630 register settings for now. Still not working, though.
- Removed outdated OV518 reset sequence.
- ov511.txt: Updated