Added lightweight iteration mechanism
Added lightweight iteration mechanism

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