made distinction between number of classes, and num labels in gt images
added superpixel graph class
started new class tools module, old one deprecated eventually
started new app to do superpixel segmentation

wheels are off
Merge branch 'master' of github.com:jsherrah/alienMarkovNetworks

Conflicts:
	SuperPixels.py
nearly got superpixels all through maxflow

just one cython compiler bug, then will come the c++, wheels are off
Merge branch 'master' of github.com:jsherrah/alienMarkovNetworks