Camera Flags - Auto Exposure, Auto White Balance, Raw Color, & Mirror

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This enables toggling of a few camera flags. Available flags are in the freenect_flag enum and values in freenect_flag_value. Call freenect_set_flag() to enable or disable a flag.

Internally, hardware commands and register handling were split out into flags.h and flags.c.

There are two caveats with mirror:

• The IR stream cannot be mirrored (in hardware) since doing so corrupts the stream.
• Video stream is of slightly lower quality when mirrored because the Bayer decoder assumes a GB interleave but a mirrored stream has a BG interleave.

Signed-off-by: Benn Snyder benn.snyder@gmail.com

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If there are no objections by July 12 (1 week), I will merge this into unstable.