add gitter chat

README.md

@@ -1,6 +1,7 @@
 ## Hivemind
 [![Build status](https://circleci.com/gh/learning-at-home/hivemind.svg?style=shield)](https://circleci.com/gh/learning-at-home/hivemind)
 [![Documentation Status](https://readthedocs.org/projects/learning-at-home/badge/?version=latest)](https://learning-at-home.readthedocs.io/en/latest/?badge=latest)
+[![Gitter](https://badges.gitter.im/learning-at-home/hivemind.svg)](https://gitter.im/learning-at-home/hivemind?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 
 A library to train large neural networks across the internet. Imagine training one huge transformer
   on thousands of computers from universities, companies, and volunteers.
@@ -12,5 +13,7 @@ A library to train large neural networks across the internet. Imagine training o
  * [Quickstart tutorial](https://learning-at-home.readthedocs.io/en/latest/user/quickstart.html) - install hivemind, 
     set up a server and train experts  
  * Documentation & guides: [learning-at-home.readthedocs.io](https://learning-at-home.readthedocs.io)
- * [Contributor's guide](https://learning-at-home.readthedocs.io/en/latest/user/contributing.html): best practices, tests and performance benchmarks
+ * Want to contribute? take a look at the issues or join [our chat room](https://gitter.im/learning-at-home/hivemind)
+ * [Developer's guide](https://learning-at-home.readthedocs.io/en/latest/user/contributing.html): best practices, tests and performance benchmarks
  * [Related](https://learning-at-home.readthedocs.io/en/latest/user/acknowledgements.html) projects and acknowledgements
+