Added initial version of flow_huber_py.py. Working almost same as original matlab version by Ayvaci, Raptis, Soatto, "Occlusion Detection and Motion Estimation with Convex Optimization", NIPS, 2010.
To make it identical you need at least
-add antialiasing in image resize as in matlab
-check median filtering and bicubic resize procedures
-check precision of floating point operations