support line stipples, color and width in vtkPolyDataItem.
Now only vtkPlot has:
SetColor()
SetWidth()
GetPen()->SetLineType()
This is needed for uvcdat context2d work. @aashish-chaudhary @alvaro.sanchez
Now only vtkPlot has:
SetColor()
SetWidth()
GetPen()->SetLineType()
This is needed for uvcdat context2d work. @aashish-chaudhary @alvaro.sanchez