ENH: Added a toy example of an indexed label array.
ENH: Added a toy example of an indexed label array.

Change-Id: Iec4e915410f4c69394b5570ee4a61a5cca5c77ec

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