README.md in slack-api-1.1.6 vs README.md in slack-api-1.2.0

@@ -30,9 +30,13 @@
 end
 
 Slack.auth_test
 ```
 
+### RTM
+
+[Slack Bot Real Time Messaging API Integration in Ruby Tutorial](http://code.dblock.org/2015/04/28/slack-bot-real-time-messaging-api-integration-tutorial.html) thanks @dblock
+
 ## Contributing
 
 1. Fork it ( http://github.com/aki017/slack-ruby-gem/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)
 3. Commit your changes (`git commit -am 'Add some feature'`)