Updated release of the PKinect library

Finally, I updated the original PKinect Processing library for the Microsoft Kinect camera with the latest Kinect for Windows SDK 1.8 and built with Java JRE 1.7 update 51. It was tested in the latest Processing version 2.1.1.

The testing library can be temporarily downloaded here. Place the code folder into your Processing sketch folder. The latest sources will be released in Github soon.