write a README at the _examples/tutorial/vuejs-todo-mvc mini tutorial, which will be published to other sites soon

Former-commit-id: cee096d0e327b0180bd4ec83d5674729c67b3ddb

_examples/tutorial/vuejs-todo-mvc/src/web/controllers/todo_controller.go

@@ -52,6 +52,10 @@ func (c *TodoController) Post(newItems []todo.Item) PostItemResponse {
 }
 
 func (c *TodoController) GetSync(conn websocket.Connection) {
+	// join to the session in order to send "saved"
+	// events only to a single user, that means
+	// that if user has opened more than one browser window/tab
+	// of the same session then the changes will be reflected to one another.
 	conn.Join(c.Session.ID())
 	conn.On("save", func() { // "save" event from client.
 		conn.To(c.Session.ID()).Emit("saved", nil) // fire a "saved" event to the rest of the clients w.

_examples/tutorial/vuejs-todo-mvc/src/web/public/js/app.js

@@ -1,5 +1,5 @@
 // Full spec-compliant TodoMVC with Iris
-// and hash-based routing in ~120 effective lines of JavaScript.
+// and hash-based routing in ~200 effective lines of JavaScript.
 
 var socket = new Ws("ws://localhost:8080/todos/sync");