ENH: Use vtksys::Directory instead of vtkDirectory. Reduces link set of vtkObject.
ENH: Use vtksys::Directory instead of vtkDirectory. Reduces link set of vtkObject.

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