csg_stat: move bonded interaction check to BeginEvaluate
csg_stat: move bonded interaction check to BeginEvaluate

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