Support for other languages that compile to JS

[webpapaya]

I'm currently trying to learn http://elm-lang.org/ it would be pretty cool to use tddbin to learn it. Besides elm tddbin could support other languages as well.

• https://github.com/clojure/clojurescript
• https://www.dartlang.org/
• https://www.typescriptlang.org/
• http://elm-lang.org/

So tddbin could become a learning platform for languages which run in the browser and node.