Issue warning on Google API quota error.

README.rdoc

@@ -175,10 +175,7 @@ If anyone has a more elegant solution to this problem I am very interested in se
 
 == To-do List
 
-* handle OVER_QUERY_LIMIT error
-  * raise exception? maybe only when address! or search! is called
-  * print warning?
-* support DataMapper, Mongoid, etc
+* support different ORMs (DataMapper, Mongoid, etc)
 * use completely separate "drivers" for different AR adapters?
   * seems reasonable since we're using very DB-specific features
   * also need to make sure 'mysql2' is supported

lib/geocoder/lookup.rb

@@ -49,7 +49,11 @@ module Geocoder
     def parsed_response(query, reverse = false)
       if doc = fetch_data(query, reverse)
         doc = ActiveSupport::JSON.decode(doc)
-        doc && doc['status'] == "OK" ? doc : nil
+        if doc && doc['status'] == "OK"
+          return doc
+        elsif doc['status'] == "OVER_QUERY_LIMIT"
+          warn "Google Geocoder API error: quota exceeded."
+        end
       end
     end
 
@@ -78,3 +82,4 @@ module Geocoder
     end
   end
 end
+