Provide py3k module initialization.
Provide py3k module initialization.

This changes the return value of the "real_init" function from void
to PyObject *, in accordance with the new PyInit method.

gram526/VTK,mspark93/VTK,keithroe/vtkoptix,keithroe/vtkoptix,mspark93/VTK,sumedhasingla/VTK,mspark93/VTK,gram526/VTK,sankhesh/VTK,gram526/VTK,SimVascular/VTK,sumedhasingla/VTK,sankhesh/VTK,gram526/VTK,sankhesh/VTK,sumedhasingla/VTK,jmerkow/VTK,keithroe/vtkoptix,jmerkow/VTK,mspark93/VTK,jmerkow/VTK,sankhesh/VTK,keithroe/vtkoptix,jmerkow/VTK,sankhesh/VTK,SimVascular/VTK,jmerkow/VTK,SimVascular/VTK,sankhesh/VTK,jmerkow/VTK,sankhesh/VTK,keithroe/vtkoptix,mspark93/VTK,sumedhasingla/VTK,mspark93/VTK,sumedhasingla/VTK,gram526/VTK,SimVascular/VTK,jmerkow/VTK,mspark93/VTK,keithroe/vtkoptix,mspark93/VTK,jmerkow/VTK,SimVascular/VTK,SimVascular/VTK,SimVascular/VTK,sumedhasingla/VTK,keithroe/vtkoptix,sankhesh/VTK,gram526/VTK,sumedhasingla/VTK,sumedhasingla/VTK,gram526/VTK,gram526/VTK,SimVascular/VTK,keithroe/vtkoptix