* gdcmPython/CMakeLists.txt: SWIG_FLAGS doesn't declare includeall

  * gdcmPython/CMakeLists.txt: SWIG_FLAGS doesn't declare includeall
    to avoid inclusion recursion until STL is reached.
  * src/gdcmDocument.[h|cxx]: exceptions substituted to errno C-style
    mecanism. errno.h is not included in gdcm anymore.
  * src/gdcmException.h: introduced new gdcmFormatUnexpected class
    (gdcmFormatError now inherits from gdcmFormatUnexpected).
  * TODO updated