Merge pull request #1 from gitter-badger/gitter-badge

Add a Gitter chat badge to README.md

README.md

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 # Sensu [![Ansible Galaxy](https://img.shields.io/badge/galaxy-cmacrae.sensu-660198.svg?style=flat)](https://galaxy.ansible.com/list#/roles/3802)
 
+[![Join the chat at https://gitter.im/cmacrae/ansible-sensu](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/cmacrae/ansible-sensu?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
 This role deploys a full [Sensu](https://sensuapp.org) stack, a modern, open source monitoring framework.
 
 ## Features