deis/deis — pull request #893 by mboersma (2014-05-05 21:59:38+00:00)
Title: fix(docker): use btrfs inside builder

We have seen mixed usage of aufs and btrfs cause problems before. On
CoreOS, btrfs rules the day, so use that.

We hoped this would work around https://github.com/deis/deis/issues/882,
but no. Regardless, it should be changed soon.