create function commented out due to wrong implementation
load(..) and save(..) functions added
added nonfree module since perPixRegression class depends on SIFT and SURF
minor changes for addition of new class - Filenode changed to FileStorage in read function, minor bugs
new class perPixRegression added, implements Pixel Level Classification from --Li, Cheng, and Kris M. Kitani. Pixel-level Hand Detection in Ego-Centric Videos.--, some original code used provided by Kris Kitani