Merge pull request #498 from tillarnold/drone

Add drone

README.md

@@ -752,6 +752,7 @@ See **[Ticketing](#ticketing)**
 
 ### Continuous Integration
 
+  * [drone](https://drone.io/) - Drone is a Continuous Delivery platform built on Docker, written in Go. ([Source Code](https://github.com/drone/drone)) `Apache` `Go`
   * [Factor.io](https://factor.io/) - It's like IFTTT (if-this-then-that) for Dev and DevOps. ([Source Code](https://github.com/factor-io/factor)) `MIT` `Ruby`
   * [Jenkins](https://jenkins-ci.org/) - Continuous Integration Server. ([Source Code](https://github.com/jenkinsci/jenkins/)) `MIT` `Java`
   * [PHPCI](https://www.phptesting.org/) - Free and open source continuous integration specifically designed for PHP. ([Source Code](https://github.com/block8/phpci)) `BSD` `PHP`