WIP chore(*): bump CoreOS to 472.0.0

Work-in-progress, scheduler fixes still needed.

See https://coreos.com/releases/#471.0.0. CoreOS now includes Docker 1.3.0.

Please double-check alpha IDs at https://coreos.com/docs/running-coreos/cloud-providers/ec2/ and https://coreos.com/docs/running-coreos/cloud-providers/google-compute-engine/