Merge pull request #215 from joergkappes/RC-2.3

minor cmake bug with matlab
Merge pull request #216 from joergkappes/RC-2.3

small bugfixes
Merge pull request #217 from joergkappes/RC-2.3

refactor libdai wrappers for the new visitors
Merge pull request #218 from joergkappes/RC-2.3

add simple lower bound for FastPD - Thanks to Bogdan Savchynskyy
Merge pull request #23 from opengm/RC-2.3

from rc2.3
added python example,updated changelog
Merge pull request #219 from DerThorsten/master

from thorsten to rc2.3
added python example,updated changelog
added python example,updated changelog
Merge pull request #220 from DerThorsten/master

last minute bug fix!
Merge pull request #57 from opengm/RC-2.3

update from opengm:master