NEW FEATURES:
- Support for the SAA7111A video decoder chip (used in LifeView CapView).
- Added "fastset" module parameter. Speeds up changing of picture settings, at
  the expense of picture stability.
- Added "force palette" parameter, which causes ov511 to reject all video
  formats except for the one specified. Useful for application testing purposes.

BUG FIXES:
- Set contrast/brightness/saturation/hue functions weren't restarting ov511 if
  an error occurred.
- ov511->hue, and other picture setting variables, are set and used when needed.
- On OV7620, brightness is only set if autoadjust is off.
- Hue control on OV7620 disabled until the correct way to set it is found.
- ov51x_get_saturation() was incorrect for OV7620.
- ov511_get_depth() fixed for planar formats.
- Mode initialization wasn't being completed with OV6620/OV6630.
- YUV422P conversion fixed.
- Wrong frame sizes were being reported in debug mode.
- frame->grabstate is reset on open(), to allow recovery from app crashes.
- read() was determining frame size incorrectly, causing it to not work.
- Hue, color, etc... variables were not being initialized.
- vmalloc and vfree are exported to the decompressors without versions, to fix
  potential problems with binary module support.

VISIBLE CHANGES:
- ttpp module parameter removed (it's the default now).
- Format conversion performance dramatically improved.
- GBR422 mode temporarily disabled (new format conversion code is incompatible)
- Default image parameters are set during open(), in case apps don't set them.
- Implemented VIDIOCGUNIT ioctl.
- ov511.txt: Updated.

INTERNAL CHANGES:
- MAX_FRAME_SIZE() is now dynamically determined based on sensor, to save RAM.
- ov511_restart() only restarts if camera is stopped, for performance purposes.
- Unnecessary stop/restart calls removed from various "get" functions.
- get_frame_length() added.
- Separated all of OV511/OV518 and sensor init code.
- Added decoder_set_input() decoder_get_input_name(), and decoder_set_norm().
- All incremental (non-ttpp) format conversion code removed.
- Added an intermadiate buffer (ov511->tempbuffer) to speed up format conversion
- Minimum width set based on sensor.
- ov511.h: Removed ALLOCATE and FREE macros.
- ov511.h: Removed many unused structure members.
- ov511.h: Added check that OV511_NUMFRAMES is in bounds.