Added GetModified and SetUnmodified functions to XmUGrid
Added GetModified and SetUnmodified functions to XmUGrid.
Changed XmUGrid::SetLocation to not check for valid cells. Instead must call IsValidPointChange to check if the change is valid.
Changed XmUGrid::PointCount to GetPointCount.
Changed XmUGrid::SetLocation to SetPointLocation.
Added python binding to see if two edges are equivalent.