Added algorithm for CVPR 2014 submission
"Partial Optimality by Pruning for MAP-inference with General Graphical Models".
Similar to iterative relaxed inference, however only supports fixing all
labels of a certain node, not excluding individual labels.
Merge branch 'partialOptimality' of github.com:pawelswoboda/opengm into partialOptimality
Merge Anne Teepe's contribution for building reduced graphical model and
translating labelings between reduced and original graphical model and
Swoboda's addition of CVPR 2014 algorithm.