* Added python wrappers of vtkGdcmReader vtk class (see the

  * Added python wrappers of vtkGdcmReader vtk class (see the
        source in vtk/vtkGdcmReader.cxx) :
        - vtk/Makefile.am now builds a library
        - gdcmPython/Makefile.am now builds vtkgdcmPython a second import
          python library (as opposed to _gdcm.so wich are the python
          wrappers of gdcm). vtkgdcmPython.so uses the vtk python wrappers
          (vtkWrapPython and vtkWrapPythonInit utility) to build vtkgdcmPython
          import library.
        - configure.in has an additional flag --enable-vtk that needs
          to be set to enable compilation of vtk related code, that is:
          + vtk/vtkGdcmReader.so and
          + vtk/testvtkGdcmReader C++ demo of vtk wrappers of gdcm)
          + gdcmPython/vtkgdcmPython.so (see above)
        - gdcmPython/demo/vtkGdcmDemo.py corrected (some images cannot
          be read when compressed or when HighBit + 1 != BitsStored),
        - gdcmPython/demo/vtkGdcmReader.py added. This demo illustrates
          the usage of the python wrapper of vtkGdcmReader vtk class.
      * vtk/vtkGdcmReader.cxx: bug fixed (thanks to Benoit Regrain).