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Use namespace gdcm:
  Problem: using enum with name like 'Unknow' on .Net, or LP on cygwin 
           causes problems.
  Question: when introducing the namespace, should we remove the gdcm
            prefix from classes or keep it ?
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Convert the C-like IO to C++ IO:
  Goal: remove all the C-oriented IO references like FILE*, fread...
        with the C++ fstream notation. Provide overload of operators
        << and >> for any gdcm class using file IO.
  Question: the underlying jpeg libraries (written in C) use the FILE*
        notation. Is there a way to still use fstream in gdcm, and 
        build or pass the proper FILE* to jpeg libs ?
  References:
        binary IO are available at
        http://www.angelfire.com/country/aldev0/cpphowto/cpp_BinaryFileIO.html
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Switch from errno C-style to exceptions:
  Goal: remove all the C-oriented errno (#include <errno.h>) and switch
        to C++ exceptions.
  Note: - only src/gdcmDocument.cxx includes errno.h
        - when exceptions were first introduced within gdcm, it caused 
        gdcmPython to be uncompatible within the corresponding version
        of wxPython (refer to the first lines of
        Test/ExceptionAndPython/README). Hence we reverted to the old
        errno mecanisme. Since wxPython seems not to be problem anymore
        (check it with Test/ExceptionAndPython) we can now move back to C++
        exceptions.
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CLEANUP:
 - Remove ignore_shadow from gdcmDocument().
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* vtk/vtkGdcmHeader.cxx: if speed becomes a concern some changes can
  be made at the cost of memory consumption (refer to header of 
  vtk/vtkGdcmHeader.cxx)
* Add a GetVersion() global function.
* gdcmElValSet::SetElValueLengthByNumber IMNSHO should be trashed.
  It's only purpose is a onliner substitute to calling GetElValueByNumber
  and then SetLength. This only obfuscates the caller code more than
  clarifying it.
  Besides the definition of gdcmElValSet::SetElValueLengthByNumber itself
  it quite poor since it is a almost exact copy of
  gdcmElValSet::GetElValueByNumber except for the returned code.
  gdcmHeader::SetPubElValLengthByNumber (which is based on 
  gdcmElValSet::SetElValueLengthByNumber) is used nowhere...
* The declarations commented out and starting with "TODO Swig" (try
  grep "TODO Swig" *.h) needed to be temporarily removed for swig to
  proceed correctly (in fact problems appears at loading of _gdcm.[so/dll]).
  So, simply uncomment the declaration once you provided the definition of
  the method...
* Fix the bug in Test/bug1.cxx (see first comment line): Win32 only.
* All (or at least many of) the methods of gdcmHeader whose only arguments
  are an ElValue* (e.g.  FindLength, FindVR, LoadElementValue...) can
  be moved away to ElValue class on condition of transmitting the
  gdcmHeader.fp attribute. This change should be considered since it
  would allow those method to avoid artificial calls to ElValue::GetElement(),
  ElValue::GetVR()...
* Eat leanding_trailing_whitespace (found in python/gdcmPython/gdcmi) should
  be used when parsing the dictionary in C++ !
* Group length is not a unique tag in a file. Hence avoid putting it
  in the element values dictionary without doing something smarter
  (say, instead of storing the length store the group and the length
   so we can related a length to a group).
* GetPubElValByNumber doit faire la difference entre chaine vide 
  et chaine pas touve''. Eventuellement raiser une exception ?
* gdcmHeader::LoadElements only loads the element whose length is
  below the specified size. When accessing the value of such an element
  the content is unfound ! Find a decent way of loading the value on
  explicit demand.
* JPR: fournir une method qui ne fait que lire les elements passes en arguments
  sous forme d'une liste.
* JPR: gdcmHeader::CheckSwap() dans le cas ACR pas propre, degager tout de
  suite si on a deduit que c'en est pas...
* python /usr/lib/python2.2/site-packages/DaVaW/demo/dvwDcmReader.py
  and load image /home/frog/cvs/DCMlib/Data/CT-MONO2-16-ankle.dcm
  will yield wrong coloring scheme as opposed to 
  affim filein=/home/frog/cvs/DCMlib/Data/CT-MONO2-16-ankle.dcm
* gdcmFile should implement the following:
   gdcmFile WriteDicom;
   WriteDicom.SetFileName("MyDicomFile.dcm");
   string * AllTags = gdcmHeader.GetDcmTagNames();
   WriteDicom.SetDcmTag(AllTags[5], "253");
   WriteDicom.SetDcmTag("Patient Name", "bozo");
   WriteDicom.SetDcmTag("Patient Name", "bozo");
   WriteDicom.SetImageData(Image);
   WriteDicom.Write();

   Anonymize(ostream& output) {
      a = gdcmFile("toto1");
      a.SetPubValueByName("Patient Name", "");
      a.SetPubValueByName("Date", "");
      a.SetPubValueByName("Study Date", "");
      a.write(output);
   }