- Add symbols #perp, #parallel and #odot in TLatex
  New function TLatex::DrawCircle
  TLatex::DrawParenthesss rewritten

- Several mods in TGraph fitting functions to allow fitting in a sub range
  with points not in increasing order.


git-svn-id: http://root.cern.ch/svn/root/trunk@69 27541ba8-7e3a-0410-8455-c3a389f83636