[EDIT: Updated on 2014-10-11] Dart, the new programming language for modern web apps, certainly compiles to JavaScript. Did you know that Dart also runs on the server as well? Thanks to Heroku's support for third-party runtimes, you can now run your server-side Dart app on Heroku's cloud. Read on to learn how. (Disclaimer: Even though Heroku can host arbitrary runtimes, they don't officially suppo