added Bolt CMS to README

README.md

@@ -448,6 +448,7 @@ CMS are a practical way to setup a website with many features. CMS often come wi
   * [Backdrop CMS](https://backdropcms.org/) - The comprehensive CMS for small to medium sized businesses and non-profits. ([Source Code](https://github.com/backdrop/backdrop)) `GPLv2` `PHP`
   * [Baun](https://bauncms.com/) - A modern, lightweight, extensible CMS for PHP. ([Source Code](https://github.com/BaunCMS/Baun)) `MIT` `PHP`
   * [BigTree CMS](https://www.bigtreecms.org/) - Straightforward, well documented, and capable written with PHP and MySQL. ([Source Code](https://github.com/bigtreecms/BigTree-CMS)) `LGPLv2` `PHP`
+  * [Bolt CMS](https://bolt.cm/) - Open source Content Management Tool, which strives to be as simple and straightforward as possible. ([Source Code](https://github.com/bolt/bolt)) `MIT` `PHP`
   * [CMS Made Simple](http://www.cmsmadesimple.org/) - Open source content management system, faster and easier management of website contents, scalable for small businesses to large corporations. ([Source Code](http://svn.cmsmadesimple.org/svn/cmsmadesimple/trunk/)) `GPL` `PHP`
   * [Concrete 5 CMS](http://www.concrete5.org/) - An open source content management system. ([Source Code](https://github.com/concrete5/concrete5)) `MIT` `PHP`
   * [CouchCMS](http://www.couchcms.com/) - Simple Open-Source CMS for designers. ([Source Code](https://github.com/CouchCMS/CouchCMS)) `CPALv1` `PHP`