BUG: Fixed the source and system include separation.
BUG: Fixed the source and system include separation.

The Python wrapping mixed in VTK include directories with the system
include directories. Separated them out so that other projects can use
the Python wrapping from outside of VTK.

Change-Id: Iadf4e7038b3468a3ae4a1106341e66b63e3d8e25

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