Add TDX_INCLUDE_DIR CMake variable
Add TDX_INCLUDE_DIR CMake variable

The path where atlbase.h can be found can theb be passed for VS express.
http://www.vtk.org/Wiki/VTK/3DConnexion_Devices_Support

Change-Id: Ic6b6251d436b32debaf7d4d04a8e017b58afe1a2

mspark93/VTK,keithroe/vtkoptix,msmolens/VTK,keithroe/vtkoptix,SimVascular/VTK,candy7393/VTK,jmerkow/VTK,candy7393/VTK,jmerkow/VTK,sankhesh/VTK,demarle/VTK,sumedhasingla/VTK,msmolens/VTK,sumedhasingla/VTK,mspark93/VTK,demarle/VTK,keithroe/vtkoptix,demarle/VTK,mspark93/VTK,sankhesh/VTK,msmolens/VTK,demarle/VTK,jmerkow/VTK,candy7393/VTK,mspark93/VTK,SimVascular/VTK,SimVascular/VTK,sankhesh/VTK,msmolens/VTK,candy7393/VTK,gram526/VTK,gram526/VTK,msmolens/VTK,mspark93/VTK,jmerkow/VTK,keithroe/vtkoptix,sumedhasingla/VTK,SimVascular/VTK,msmolens/VTK,gram526/VTK,jmerkow/VTK,msmolens/VTK,msmolens/VTK,sumedhasingla/VTK,mspark93/VTK,candy7393/VTK,SimVascular/VTK,sumedhasingla/VTK,sankhesh/VTK,keithroe/vtkoptix,demarle/VTK,keithroe/vtkoptix,keithroe/vtkoptix,sankhesh/VTK,keithroe/vtkoptix,jmerkow/VTK,gram526/VTK,gram526/VTK,candy7393/VTK,demarle/VTK,SimVascular/VTK,SimVascular/VTK,sumedhasingla/VTK,candy7393/VTK,sumedhasingla/VTK,demarle/VTK,gram526/VTK,SimVascular/VTK,gram526/VTK,mspark93/VTK,sumedhasingla/VTK,sankhesh/VTK,sankhesh/VTK,jmerkow/VTK,jmerkow/VTK,demarle/VTK,candy7393/VTK,gram526/VTK,sankhesh/VTK,mspark93/VTK