Bug 1003729 - Update version of pip installed on automation machines from 0.8.2 to 1.5.5. r=dustin over IRC
Bug 1027134 - manage_instance_storage.py should consider root  volume size. r=catlee
Bug 712206 - slave pre-flight tasks. r=dustin
Bug 712206: backed out changeset 58a3c0e9ae64

we didn't get the correct ordering of puppet -> runner -> buildbot.
Bug 1014047: set an explicit value for Package.allow_virtual; r=Callek
Bug 1014047: add environment.conf; r=Callek
Bug 1014047: use directory environments; r=Callek

Note that this makes existing user environments invalid, as they are
located at /etc/puppet/environments/$user/env/, and the "env/" suffix
is not compatible with directory environments.