progrium/buildstep — pull request #67 by amaltson (2014-01-09 02:38:33+00:00)
Title: Add missing heroku's default buildpacks

Probably makes sense to have all of Heroku's [default buildpacks](https://devcenter.heroku.com/articles/buildpacks#default-buildpacks) available in Dokku:

- gradle
- grails

Minor cleanup of buildpacks.txt