functions_common.sh: added to_int function
functions_common.sh: added to_int function

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