Merge pull request #51 from joergkappes/RC2.1

Rc2.1
UNTESTED HOTFIX
fixed gibbs set starting point bug......grrrr
Merge pull request #55 from joergkappes/RC2.1

add missing const in caller, shift matlabdependences in interface/matlab...
Merge pull request #57 from joergkappes/RC2.1

Rc2.1
Merge branch 'RC2.1' of git://github.com/opengm/opengm into RC2.1
Merge pull request #58 from joergkappes/RC2.1

add example code to build and convert models
Merge pull request #59 from joergkappes/RC2.1

add licence and changelog
Merge branch 'RC2.1' of git://github.com/opengm/opengm into RC2.1
Python Changes:
 - changed value type in python from float to double
 - added AlphaExpasionFusion to Python
Merge branch 'RC2.1' of github.com:DerThorsten/opengm into RC2.1
fixed minor starting point related bug
minor changes
alpha expansion fusion fixes, a WITH_QPBO was missing
replaced asNumpy,asList,asTuple with __array__  __list__ __tuple__
Merge branch 'RC2.1' of github.com:DerThorsten/opengm into RC2.1
added check macro
Merge branch 'RC2.1' of github.com:DerThorsten/opengm into RC2.1
first impl. of wrapper of reduced inference
added macro to do runtime checks (no matter if release or debug)