* Changed the layout of the python part to avoid bloating main

  * Changed the layout of the python part to avoid bloating main
        directory with setup.py, distutilsSwigCPlusPlus.py, MANIFEST.in
        i.e. the distutils arsenal. All the python related stuff is
        again in a python subdir, but the package itself is now in
        python/gdcmPython.
      * setup.py was cleaned up:
        - pythonIncludePath removed
        - python setup.py bdist target is now functional.
      * gdcmPython/__init__.py doesn't export FileName any more (to avoid
        collision with other packages). gdcmPython/demo/*.py changed
        accordingly.   --- Frog