Forumla for Golo JVM Language

Hi,

![logo-golo](https://f.cloud.github.com/assets/1280212/307957/fdeed042-96d5-11e2-9a4f-4e1479582698.png)
It's the formula for install [Golo JVM Language](http://golo-lang.org) on osx.

Regards,
Romain Lespinasse