Merge pull request #166 from corpsee/feature-added-category-ci

Added Continuous Integration category (separated from Testing)

README.md

 	- [Dependency Injection](#dependency-injection)
 	- [Imagery](#imagery)
 	- [Testing](#testing)
+	- [Continuous Integration](#continuous-integration)
 	- [Documentation](#documentation)
 	- [Security](#security)
 	- [Code Analysis](#code-analysis)
 * [VFS Stream](https://github.com/mikey179/vfsStream) - A virtual filesystem stream wrapper for testing.
 * [VFS](https://github.com/adlawson/vfs.php) - Another virtual filesystem for testing.
 * [Locust](http://locust.io/) - A modern load test library written in Python.
+
+## Continuous Integration
+*Applications for Continuous Integration.*
+
 * [Travis CI](https://travis-ci.org/) - A continuous integration platform.
 * [PHPCI](http://www.phptesting.org/) - An open source continuous integration platform for PHP.