doc: mapping file is also useful for bond def
doc: mapping file is also useful for bond def

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