Add set_ohm to WeatherModel

lib/weather-model.rb

@@ -11,4 +11,8 @@ module WeatherModel
       Object.const_get(settings[:sort]).const_set("#{source.to_s.gsub('_', '::')}", Class.new(Storer::Mysql)).use_settings(settings)
     end 
   end
+
+  def self.set_ohm redis
+    Ohm.redis = redis
+  end
 end