- Build out GeomFromWKB(), GeomFromText() and other functions in the GeoSimple

  class.  This mean that you can instantiate a geo object using WKB or WKT,
  run functions on it, and return it in any desired format.  It also means that
  you can do basic data manipulations without any database interaction at all!

  You can now do stuff like:

  $geo = geo_load();
  $g = $geo->geomFromWKB($wkb);
  $wkt = $g->asText();

- Completely deprecate the geo() function and the remaining sub-fuctions that
  were still in use:
    geo('rss_item')
    geo('wkt_validate')
    geo('wkt_from_point')