SYNC TO KERNEL:
- made driver announcement printk() consistent w/ rest of USB drivers

BUG FIXES:
- Fixed deadlock (if signal received by read() while sleeping, it would return
  without relinquishing ov511.lock, close() can't acquire lock, and process
  gets stuck in D state)
- ov511.txt: Fixed typos

INTERNAL CHANGES:
- Added 2.4-style module locking for open()/close() (Thanks, Chris!)
- Use VEND/PROD #defines in device_table
- Reformatted most of code to 80 columns
- Fixed some indents
- Split returns/specifiers and names in function declarations into two lines
- Made function call style consistent
- Reenable OV518 decompression
- Only enable OV518 decompression if dumppix == 0
- Simplified code in ov511_new_frame()
- Added EMAIL #define
- ov511_decomp.c: Switch back to GPL-only license
- ov511_decomp.c: Re-enable debugging support
- ov511_decomp.c: #defines for version info
- ov511_decomp.c: Removed some unused code
- ov511_decomp.c: Change to K&R bracing style
- ov511_decomp.c: Convert from C++ to C comment style
- ov511_decomp.c: Use macros in Decompress420HiNoMMX() to reduce source size
- ov511_decomp.c: Eliminated tables
- ov511_decomp.c: Eliminated unused function args
- ov511_decomp.c: Replaced use of NTSTATUS
- ov511.h: Removed IDCT and ZigZag tables
- ov511.h: Removed unused typedefs