fixed memory leak
Merge pull request #100 from fftobiwan/master

Fixed a memory leak in qpbo.hxx
Merge pull request #8 from opengm/master

update
ADSal: several bugs fixed for a case when objective value is negative
Merge pull request #101 from homul/master

bug fixes for a negative objective value and computing tree agreement
Merge pull request #102 from joergkappes/master

update
Merge pull request #20 from opengm/master

update