ax_gromacs.m4: weak check for dev version of gromacs
ax_gromacs.m4: weak check for dev version of gromacs

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