gdcmHeader = gdcm.gdcmHeader
gdcmDictSet = gdcm.gdcmDictSet
gdcmFile = gdcm.gdcmFile
+ [etc.]
Hence this whole Swig wrapping process is quite odd since we shall
wrap more classes (%include in swig.i) that eventually get exported to
the final user by gdcmPython/__init__.py.