Many changes in TGraph::Fit to use the new TVirtualFitter extended interface. The static functions GraphFitChisquare has been moved to TFitter.
Many changes in TGraph::Fit to use the new TVirtualFitter extended interface.
The static functions GraphFitChisquare has been moved to TFitter.

The global variables :
  TF1 *grF1
  TVirtualfitter *grFitter
have been deleted and replaced by functions from TVirtualFitter.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@6539 27541ba8-7e3a-0410-8455-c3a389f83636

dawehner/root,dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,dawehner/root,dawehner/root,dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT