CsgFunctions.pm: better error message in readin_table
CsgFunctions.pm: better error message in readin_table

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