1. Set the WCSTOOLS environment variable pointing to the location of
   your WCSTools distribution:

   Bourne shells
   $ WCSTOOLS=/path/to/wcstools
   $ export WCSTOOLS

   C shells
   % setenv WCSTOOLS /path/to/wcstools

2. perl Makefile.PL

3. make

4. make test

5. make install

If compilation fails, please make sure the version of WCSTools you're using
matches that listed in README as a requirement for this version of the
module.
