small cleanup of vol2lib.m
adding volknnsearch.m, k-NN search of patches in source given a set of reference volumes
updating definition and documentation of stackPatches
fix small bug in volknnsearch.m
clean up testStackPatches.m
slight documentation correction
adding isvalidoverlap check in overlapkind.m
improving documentation formatting.
adding drawPatchRect.m, draw rectangles around a patch in the current axis
rename and update grid2volSize.m
small formatting update
add multiple references support to lib2patches.m
adding patchmrf.m, mrf patch inference on patch candidates on a grid