Updates to the niftilb C package


Updates in version 0.3 April 12, 2006

    - added const in appropriate function parameter locations
    - shortened all string constants below 509 character limit
    - added nifti_is_complete_filename()
    - made minor memory fixes
    - fixed error in QSTR() definition
    - use nifti_set_filenames() in nifti_convert_nhdr2nim()
    - added new tests in Testing/niftilib/nifti_test.c
    - added skip blank extension option to keep 348 byte header
    - when reading, allow 0 or 1 in dim[] fields above dim[0]
    - added more tests to nifti_hdr_looks_good()
    - nifti_tool: added check_hdr and check_nim action options

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