Add support for setting AutoExposure/AutoWhiteBalance/RawColor and MirrorDepth/MirrorVideo

The current libfreenect drivers supports an interface to adjust some
camera settings like AutoExposure/AutoWhiteBalance/Mirroring. This
commit bridges these calls to the haskell interface.

Keep in mind: setFlag seems to be only working if the capture loop has
already started via startVideo/startDepth. It seems to me it's a bug
in libfreenect, where i have already written an issue.
Merge pull request #7 from ruuns/master

Add support for setting AutoExposure/AutoWhiteBalance/RawColor and Mirro...