Merge pull request #286 from joergkappes/master

Example image segmentation
Merge pull request #287 from joergkappes/master

More C++-Tutorials
Merge pull request #288 from joergkappes/master

BP on sum-prod semiring
Minor build system improvements.

Add BUILD_TUTORIALS option to select if src/tutorials will be built.

Fix detection of HDF5 libraries on windows.
Merge pull request #289 from burcin/cmake_tutorials

Minor build system improvements.
Merge pull request #291 from joergkappes/master

bugfix for MSVS11
Merge pull request #72 from opengm/master

bugfixes for windows