sleep machines for power savings

[jweiss]

Wit climatechange.mit.edu being a thing ( http://climatechange.mit.edu/turn-lightscomputers-night) we should re-investigate putting idle cluster machines to sleep. Since CrashPlan? is a thing too, expeanding to private workstations may also be possible, though it may not be the lowest hanging fruit.

Policy questions include: Do we need to wake the machines up at a certain time in the morning, so that they are up when ACIS/hotline checks in on them, and so they have a shot at running an overnight update cron job?