[CF-metadata] CF-1.0-beta5: grid mappings

[Brian Eaton]

All,

I've updated the grid mappings section of the CF doc to reflect the
consensus of the recent discussions.  The current draft is CF-1.0-beta5 and
is linked to the CF home page at
http://www.cgd.ucar.edu/cms/eaton/cf-metadata/index.html.

Please have a look and let me know what you think.

Thanks,
Brian

P.S.  Please feel free to comment on any aspect of the beta5 document.
      We'd love to get a non-beta version released soon.