Merge pull request #30 from DerThorsten/RC2.1

Rc2.1  Merged python wrapper to RC2.1
Merge pull request #31 from DerThorsten/RC2.1

Bugfixes on C++ side, Documentation and examples on Python side
buxfix dualdecomposition
Merge pull request #34 from joergkappes/RC2.1

buxfix dualdecomposition
move matlabdir
Merge pull request #35 from joergkappes/RC2.1

move matlabdir
Merge branch 'RC2.1' of git://github.com/opengm/opengm into RC2.1

Conflicts:
	include/opengm/inference/dualdecomposition/dualdecomposition_subgradient.hxx