Gitter
https://developer.gitter.im/docs/welcome
https://www.npmjs.com/package/node-gitter
https://www.npmjs.com/browse/keyword/gitter
https://factor.io/blog/build-your-own-chat-bot-with-gitter.html
https://github.com/LaravelRUS/Gitter
https://github.com/huafu/hubot-gitter2