Shopify/liquid — pull request #374 by byroot (2014-06-28 20:25:29+00:00)
Title: Give some :heart: to travis.yml

Both `2.1` and `2.1.1` point to `2.1.1p76` in RVM. So this save a travis worker.

Then stackprof installation was breaking `jruby-head` build.

And finally `rbx-19mode` is not supported by travis anymore, I replaced it by rbx-2.