Added a simple Edge preserving diffusion filter.
Added a simple Edge preserving diffusion filter.

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