[buildd] downtime on crest, kullervo, hobbes and q650

[Michael Schmitz <schmitz@mail.biophys.uni-duesseldorf.de>]

Hi,

I will have to take down crest, kullervo, hobbes and q650 tomorrow in
order to relocate them a few rooms down the hall, as the lab they're
currently in will totally get rebuilt in a few weeks.

We're in good shape, so we can suffer a short interruption gladly.

	Michael