Added size_t Response::size().
Added size_t Response::size().

yxw2014/Simple-Web-Server,eidheim/Simple-Web-Server,guoxiao/Simple-Web-Server,robbinsd/SimpleWebServer,bjorkegeek/Simple-Web-Server,eidheim/Simple-Web-Server,guoxiao/Simple-Web-Server,robbinsd/SimpleWebServer,yxw2014/Simple-Web-Server,moodboom/Simple-Web-Server,bjorkegeek/Simple-Web-Server,moodboom/Simple-Web-Server