From Olivier:

In Graph2D:

- A more complete example (fitting)
- Constructor from a file name
- New method Interpolate
- New method FindObject
- Fitting
- New method GetHistogram.
- New method RemovePoint
- New methods SetMaximum and SetMinimum
- plus many improvements ...

In TFitter:

- Necessary changes to support Graph2D fitting


git-svn-id: http://root.cern.ch/svn/root/trunk@7525 27541ba8-7e3a-0410-8455-c3a389f83636