* python/testSuite.py unittest test suite added (uses Data)

  * python/testSuite.py unittest test suite added (uses Data)
      * Data/* dcm and acr files for the test suite.
      * glib dependance removed from un*x version. We now use ISO C99
        7.18 Integer types (see stdint.h)
        - python/Makefile, src/Makefile src/gdcm.h
      * src/ when an explicit vr (like dicom files) suddenly poped an
        implicit element we use to mark the underlying DictEntry of the
        concerned ElValue with "Implicit". This strategy was damageable
        too the public or provite dictionaries, since some of their vr
        would be changed. Since Header::FindLength heavily relies on the
        detection by Header::FindVR of falsely explicit elements, I
        added an extra ImplicitVr member to ElValue (boolean).
        The rest of the changes we the necessary adaptations.  --- Frog