Add Microsoft Kinect v2 sensor driver

This pull requests includes different commits which add Microsoft Kinect v2 support in OpenNI 2. It implements a new OpenNI 2 driver based on the official Microsoft SDK.

Videomodes supported by this driver:
* Color: RGB888          1920x1080 30fps
* Color: RGB888          960x540   30fps
* Depth: DepthPixel      512x424   30fps
* IR:    Gray16 (ushort) 512x424   30fps

Features supported by this driver:
* DEPTH_TO_COLOR_REGISTRATION