ENH: Enumerate string arrays and plot in PC.
ENH: Enumerate string arrays and plot in PC.

Added functionality to enumerate string arrays (using
vtkStringToCategory), and to plot these columns along with normal
numerical columns in the parallel coordinates charts.

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