clean PR for opengm
FIX sample data load for Windows
FIX other two sample data load for Windows
Remove external libs, apt-get libboost and cython, make -j6
Merge pull request #82 from tesla1060/master

FIX sample data load for Windows
Merge pull request #80 from pystruct/opengm

opengm in travis build
ENH computing final objective in subgradientSSVM and NSlackSSVM.
FIX computation of primal objective in utils, add test.
Add "objective_" function to ssvm base class, refactor.
FIX call logger after the last call to compute the objective function...
FIX objective for rescale_C.
FIX Also fix SubgradientLatentSSVM objective curve.
Fix objective computeation in SubgradientLatentSSVM.