ENH: addec some const methods from Steve A
ENH: addec some const methods from Steve A

biddisco/VTK,spthaolt/VTK,aashish24/VTK-old,jmerkow/VTK,cjh1/VTK,keithroe/vtkoptix,msmolens/VTK,collects/VTK,candy7393/VTK,SimVascular/VTK,spthaolt/VTK,Wuteyan/VTK,demarle/VTK,msmolens/VTK,Wuteyan/VTK,mspark93/VTK,biddisco/VTK,msmolens/VTK,hendradarwin/VTK,gram526/VTK,arnaudgelas/VTK,sumedhasingla/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,Wuteyan/VTK,berendkleinhaneveld/VTK,mspark93/VTK,keithroe/vtkoptix,hendradarwin/VTK,demarle/VTK,berendkleinhaneveld/VTK,demarle/VTK,candy7393/VTK,collects/VTK,ashray/VTK-EVM,arnaudgelas/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,msmolens/VTK,gram526/VTK,ashray/VTK-EVM,collects/VTK,jeffbaumes/jeffbaumes-vtk,sankhesh/VTK,naucoin/VTKSlicerWidgets,biddisco/VTK,ashray/VTK-EVM,ashray/VTK-EVM,naucoin/VTKSlicerWidgets,daviddoria/PointGraphsPhase1,keithroe/vtkoptix,candy7393/VTK,Wuteyan/VTK,Wuteyan/VTK,demarle/VTK,daviddoria/PointGraphsPhase1,sumedhasingla/VTK,arnaudgelas/VTK,naucoin/VTKSlicerWidgets,cjh1/VTK,spthaolt/VTK,candy7393/VTK,naucoin/VTKSlicerWidgets,jeffbaumes/jeffbaumes-vtk,demarle/VTK,sankhesh/VTK,cjh1/VTK,sumedhasingla/VTK,sgh/vtk,hendradarwin/VTK,johnkit/vtk-dev,msmolens/VTK,demarle/VTK,Wuteyan/VTK,sankhesh/VTK,SimVascular/VTK,arnaudgelas/VTK,sgh/vtk,sumedhasingla/VTK,cjh1/VTK,jmerkow/VTK,spthaolt/VTK,sgh/vtk,gram526/VTK,collects/VTK,johnkit/vtk-dev,arnaudgelas/VTK,sumedhasingla/VTK,candy7393/VTK,daviddoria/PointGraphsPhase1,jeffbaumes/jeffbaumes-vtk,jeffbaumes/jeffbaumes-vtk,sumedhasingla/VTK,daviddoria/PointGraphsPhase1,jmerkow/VTK,sgh/vtk,keithroe/vtkoptix,biddisco/VTK,hendradarwin/VTK,msmolens/VTK,biddisco/VTK,johnkit/vtk-dev,mspark93/VTK,berendkleinhaneveld/VTK,berendkleinhaneveld/VTK,sgh/vtk,johnkit/vtk-dev,berendkleinhaneveld/VTK,msmolens/VTK,ashray/VTK-EVM,sankhesh/VTK,aashish24/VTK-old,keithroe/vtkoptix,mspark93/VTK,SimVascular/VTK,SimVascular/VTK,ashray/VTK-EVM,keithroe/vtkoptix,ashray/VTK-EVM,gram526/VTK,candy7393/VTK,aashish24/VTK-old,sankhesh/VTK,sumedhasingla/VTK,aashish24/VTK-old,gram526/VTK,johnkit/vtk-dev,cjh1/VTK,jmerkow/VTK,candy7393/VTK,jmerkow/VTK,naucoin/VTKSlicerWidgets,sumedhasingla/VTK,gram526/VTK,msmolens/VTK,jeffbaumes/jeffbaumes-vtk,arnaudgelas/VTK,gram526/VTK,collects/VTK,aashish24/VTK-old,candy7393/VTK,spthaolt/VTK,johnkit/vtk-dev,daviddoria/PointGraphsPhase1,sankhesh/VTK,keithroe/vtkoptix,jmerkow/VTK,sankhesh/VTK,jmerkow/VTK,sgh/vtk,mspark93/VTK,demarle/VTK,sankhesh/VTK,jeffbaumes/jeffbaumes-vtk,gram526/VTK,spthaolt/VTK,naucoin/VTKSlicerWidgets,ashray/VTK-EVM,spthaolt/VTK,SimVascular/VTK,Wuteyan/VTK,daviddoria/PointGraphsPhase1,johnkit/vtk-dev,hendradarwin/VTK,biddisco/VTK,mspark93/VTK,mspark93/VTK,mspark93/VTK,jmerkow/VTK,biddisco/VTK,aashish24/VTK-old,collects/VTK,cjh1/VTK,keithroe/vtkoptix,demarle/VTK,SimVascular/VTK,hendradarwin/VTK