Fix unary dimension in README, see #2.
Fix unary dimension in README, see #2.

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