message: docs: mention the gitter room in the README
  Fixes
diff: -# decaffeinate [![Build Status](https://travis-ci.org/decaffeinate/decaffeinate.svg?branch=master)](https://travis-ci.org/decaffeinate/decaffeinate) [![npm](https://img.shields.io/npm/v/decaffeinate.svg)](https://www.npmjs.com/package/decaffeinate) [![Greenkeeper badge](https://badges.greenkeeper.io/decaffeinate/decaffeinate.svg)](https://greenkeeper.io/)
  +# decaffeinate [![Build Status](https://travis-ci.org/decaffeinate/decaffeinate.svg?branch=master)](https://travis-ci.org/decaffeinate/decaffeinate) [![npm](https://img.shields.io/npm/v/decaffeinate.svg)](https://www.npmjs.com/package/decaffeinate) [![Greenkeeper badge](https://badges.greenkeeper.io/decaffeinate/decaffeinate.svg)](https://greenkeeper.io/) [![Join the chat at https://gitter.im/decaffeinate](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/decaffeinate/Lobby)
  +
  Goodbye CoffeeScript, hello JavaScript!
  @@ -28,6 +29,11 @@ information and advice on running decaffeinate on real-world code, and see
  [Cleanup suggestions after running decaffeinate][suggestions] for advice on
  cleaning up the converted JavaScript code and other things to keep in mind.
  +## Questions and support
  +
  +Feel free to join the [gitter chat room](https://gitter.im/decaffeinate/Lobby)
  +to ask questions, or you can file an issue on the [issues] page.
  +
  ## Status
  **Complete.** The project is stable enough for production use, and has been used
  