method_factory is not needed anymore and i removed it. Before method 'on' of application class taken only handler fabrics, so method_factory was usefull to make handlers from method of application. But now method 'on' can directly take method and make factory from it, so it can produce function_factory_t and avoid to use yet another factory. Also this commit solves problem with using of method factory and g++ 4.6: method_factory taken object of type 'function<string(shared_ptr<Class>, string, vector<string>)>' and it normally taken method of Class with g++ 4.4, but g++ 4.6 doesn't allow this.