FindGROMACS.cmake: re-add gmx_version check (#245)
FindGROMACS.cmake: re-add gmx_version check (#245)

Found here: https://groups.google.com/d/topic/votca-ctp/ifDrd5rTPFM/discussion

MrTheodor/csg,votca/csg,MrTheodor/csg,votca/csg,MrTheodor/csg,votca/csg,MrTheodor/csg,MrTheodor/csg,votca/csg