* Bug fix on field having a VR = 'UI'. Assume that is a string field

 * Bug fix on field having a VR = 'UI'. Assume that is a string field
     * Bug fix on test suite after remove the strip made on not string fields
     * Split the IsReadable method between gdcmParser which test that the file
       is dicom and gdcmHeader which test that it's an image file
    -- BeNours