add KeystoneJS

README.md

@@ -178,6 +178,7 @@ CMS are a practical way to setup a website with many features. CMS often come wi
   * [Grav](http://getgrav.org/) -  Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS  ([Source code](https://github.com/getgrav/grav)) `MIT` `PHP`
   * [GetSimple CMS](http://get-simple.info/) - The Simplest Content Management System. Ever. `GPLv3`
   * [Joomla!](http://www.joomla.fr/) - Advanced Content Management System (CMS) `GPL`
+  * [KeystoneJS](http://keystonejs.com/) - Node.js CMS & Web Application Platform ([Demo](http://demo.keystonejs.com/), [Source Code](https://github.com/keystonejs/keystone)) `MIT`
   * [Movable Type](https://movabletype.org/) - a powerful solution for the creation and management of web content.
   * [october](http://octobercms.com/) - Free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. ([Source code](https://github.com/octobercms/october)) `MIT`
   * [Pagekit](http://pagekit.com/) - A new modern CMS to create and share ([Source code](https://github.com/pagekit/pagekit)) - `MIT`