Prototype of image registration support for Kinect driver.
Added missing implementation of KinectDevice::isImageRegistrationModeSupported.
Work around an issue suspiciously caused by NuiImageGetColorPixelCoordinateFrameFromDepthPixelFrameAtResolution.
Fixed the horizontal drifting issue!
Fixing the algorithm by using INuiCoordinateMapper.
Performance improvement.
I eventually abandoned INuiCoordinateMapper approach because it turned out to be possibly slow.
More aggressive optimization and got >10% improvement!
Merge pull request #4: Image registration support for Kinect driver (Thanks, tomoto!)

See https://github.com/OpenNI/OpenNI2/pull/4 for details.

Conflicts:
	Source/Drivers/Kinect/DepthKinectStream.cpp