Using the default abbr class pattern for geo microformats instead of

Using the default abbr class pattern for geo microformats instead of
the shorthand that I've proposed at
http://microformats.org/wiki/geo-brainstorming#latitude_longitude_shorthand_and_geo_link

If anyone wants to pick up on where the discussion was left off or
get more implementation support by other sites and software, and be
recognized by parsers, I'd be happy to go back to the shorthand.
Because you know, it actually makes a lot of sense.