Merge pull request #235 from joergkappes/master

Fig AStar bug
Merge pull request #1 from opengm/master

getting updates from master repo
For TRWS-based dual decomposition a decoding to unrestricted dual vectors added
Nesterov refactored
Merge pull request #236 from homul/master

TRWSi: hot start added
Merge pull request #237 from joergkappes/master

fig bug in dynamic programming.
Update README.md
Update ChangeLog.txt
Merge pull request #63 from opengm/master

update from opengm:master