Merge pull request public-apis#86 from Matsv/gitter

Add Gitter API

Author: toddmotto

README.md

@@ -30,6 +30,7 @@ A collective list of JSON APIs for use in web development.
 | UI Names | Generate random fake names | No | [Go!](https://github.com/thm/uinames) |
 | Adorable Avatars | Generate random cartoon avatars | No | [Go!](http://avatars.adorable.io) |
 | Github - User Data | Pull public information for a user's github | No | [Go!](https://api.github.com/users/hackeryou) |
+| Gitter | Chat for GitHub | Yes | [Go!](https://developer.gitter.im/docs/) |
 | JSONPlaceholder | Fake data for testing and prototyping | No | [Go!](http://jsonplaceholder.typicode.com/) |
 | RoboHash | Generate random robot/alien avatars | No | [Go!](https://robohash.org/) |
 | API Only | Several APIs free. | No | [Go!](http://apionly.com/) |