Merge pull request #1 from opengm/master

from master to my fork
work in progress
added pottsModel3d
Merge pull request #310 from DerThorsten/master

Python: Potts model for 3d Volume with flexible regularizer
Added support of mask image for 3d Volume Potts model with flexible regularizer
Merge pull request #312 from JensNRAD/mask_ext

Added support of mask image for 3d Volume Potts model with flexible regu...
Merge pull request #313 from joergkappes/master

handle arbort due to timeout status correctly
Merge pull request #314 from joergkappes/master

sequential mesegepassing, daoopt-cmake-fix
Merge pull request #78 from opengm/master

Python update