Add methods to get the z-buffer partition for this renderer and whether or not this renderer is transparent.
Add methods to get the z-buffer partition for this renderer and whether
or not this renderer is transparent.

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