h4h5tools

Updated for pending v2.2.0 release.

README.txt:
   Added the version information as first line in file, similar to other HDF
   software.

RELEASE.txt:
   Corrected domain name (was hdfgroup.com, now hdfgroup.org).
   Updated Platform Tested information.
   Removed Mac platform which is not tested in this release.
   Removed optional feature of HDF-EOS2/netCDF-4 verifier since it was not
   tested in this release.