Support for multiple ip geocoders. Requires an update to the Geokit G…

…em also.

This feature depend on the following external dependancy, first commited as:
pull url = git@github.com:dreamcat4/geokit-gem.git
4f1c20455d3d7cf3dabe17bc492012a19d7aa000 Support multiple ip geocoders, including new setting for ip_provider_order

However the changes may have been published as a different commit. To be sure:
If your geokit gem is up to date (and greater than 1.3.0), then it may include the following line:

$GEOKIT_GEMDIR/lib/geokit/geocoders.rb:73:
+    @@ip_provider_order = [:geo_plugin,:ip]

lib/geokit-rails/acts_as_mappable.rb

@@ -369,7 +369,7 @@ def extract_bounds_from_options(options)
 
         # Geocode IP address.
         def geocode_ip_address(origin)
-          geo_location = Geokit::Geocoders::IpGeocoder.geocode(origin)
+          geo_location = Geokit::Geocoders::MultiGeocoder.do_geocode(origin, true)
           return geo_location if geo_location.success
           raise Geokit::Geocoders::GeocodeError
         end