Merge pull request #186

* Updated the xmpp.NewClient call in the README.md example to pass the config parameter as a pointer (&config) instead of a value.

README.md

@@ -124,7 +124,7 @@ func main() {
 	router := xmpp.NewRouter()
 	router.HandleFunc("message", handleMessage)
 
-	client, err := xmpp.NewClient(config, router, errorHandler)
+	client, err := xmpp.NewClient(&config, router, errorHandler)
 	if err != nil {
 		log.Fatalf("%+v", err)
 	}