Merge pull request #608 from exviva/fix_warnings

lib/geocoder/cache.rb

lib/geocoder/lookups/base.rb

lib/geocoder/lookups/cloudmade.rb

lib/geocoder/lookups/maxmind_local.rb

lib/geocoder/lookups/yahoo.rb

lib/geocoder/models/base.rb

lib/geocoder/railtie.rb

lib/geocoder/request.rb

lib/geocoder/results/test.rb

lib/geocoder/stores/active_record.rb