grid search bug was a rounding error for negative coordinates (fixes issue 113)
grid search bug was a rounding error for negative coordinates (fixes issue 113)

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