Refactor ClientManager into a more generic StreamManager

_examples/xmpp_echo/xmpp_echo.go

@@ -28,7 +28,7 @@ func main() {
 
 	// If you pass the client to a connection manager, it will handle the reconnect policy
 	// for you automatically.
-	cm := xmpp.NewClientManager(client, nil)
+	cm := xmpp.NewStreamManager(client, nil)
 	err = cm.Start()
 	if err != nil {
 		log.Fatal(err)

_examples/xmpp_jukebox/xmpp_jukebox.go

@@ -107,7 +107,7 @@ func connectXmpp(jid string, password string, address string) (client *xmpp.Clie
 		return
 	}
 
-	if _, err = client.Connect(); err != nil {
+	if err = client.Connect(); err != nil {
 		return
 	}
 	return