extrapolate.pl: added extrapolation method constant
extrapolate.pl: added extrapolation method constant

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