4.5.1

1. Fix - correctly handle ^2..^9 in TFormula equations
2. Fix - support TMath::Gaus in TFormula
3. Fix - correctly display ^2 and ^3 in SVG text output
4. Fix - do not show tooltips for empty TProfile bins
5. Fix - statbox toggling was not working on subpads
6. Fix - positioning of 3D objects in Webkit browsers in complex layouts
7. Fix - difference in TF1 between ROOT5/6 (#54)