add modules supports

server.go

 }
 
 // Use add the middleware module into the stack chain.
-func (self *server) Use(module func(http.Handler) http.Handler) {
-	self.middleware.stack = append(self.middleware.stack, module)
+func (self *server) Use(module ...func(http.Handler) http.Handler) {
+	self.middleware.stack = append(self.middleware.stack, module...)
 }
 
 // Get is a shortcut for mux.HandleFunc(pattern, handler).Methods("GET"),