h4map

Purpose: Cleanup
Description:
    - Removed large amount of HDF4 library internal code from h4_sds.c
      by changing Makefile to use the library and by using two new APIs
      SDgetdatainfo and SDgetdatainfo_count.  Makefile is still temporary
      until configuration is established.
    - Uncommented calls to write_map_ris, write_map_sds, and write_map_vdata
      in xml_hmap.c
    - Corrected typo in data/runmap.sh
        replaced: rm -f $TESTFILE.mapping.xml
        with:     rm -f $TESTFILE.map.xml

Platforms tested:
    Linux/32 2.6 (jam)