cleaner docstring and added reference to original C++ file
cleaner docstring and added reference to original C++ file

lucasb-eyer/pydensecrf,lucasb-eyer/pydensecrf,crowd-ai/post-processing-experiments,lucasb-eyer/pydensecrf,crowd-ai/post-processing-experiments,crowd-ai/post-processing-experiments,crowd-ai/post-processing-experiments