Squash changes containing private information There were a lot of changes since the previous commit, but a lot of them contained personnal information about users. All thos changes got stashed into a single commit (history is kept in a different place) and private information was moved in a separate private repository
First attempt at making declarative VMs In order to make buildbot more secure, the builds need to happen inside VMs so that they can be thrown out on demand when not needed. This commit implements this facility on dilion, and also defines declaratively some previous VMs which used to run on the machine.