Getting plugin CI tests working on travis is now super easy with the recent changes to the docker_test rake task. I’ve update the gist in my top post. discourse-chat-integration currently takes about 3.5 mins to load the image, setup, run rspec tests & qunit tests, so pretty quick by travis standards.
https://gist.github.com/davidtaylorhq/0c73c93af68724ffbd47f18eff7fbb12
@team could someone please make the top post a wiki so I can update it? 
Also, would you accept PRs to add travis to official plugin repos?