update readme

Author: azat-co

readme.md

@@ -1,9 +1,10 @@
 > Todo app with Express.js
 
-This is an example of classical (no front-end JavaScript frameworks) web application built with Express.js 3.3.5.
+This is an example of create, read, update, delete web application built with Express.js v4.8.1, and Mongoskin&MongoDB for [Pro Express.js](http://proexpressjs.com).
+
 The full source code is available at [github.com/azat-co/todo-express](http://github.com/azat-co/todo-express).
 
-More Express.js in [Express.js Guide](http://expressjsguide.com).
+More Express.js in [Pro Express.js](http://proexpressjs.com).
 
 More Node.js frameworks at [nodeframework.com](http://nodeframework.com).