Merge pull request rancher#130 from cloudnautique/gce_image_cloud_init

added google cloud config

Attempt to set hostname from DHCP

Dynamically set version for ubuntu console

Change volume containers to create only

Add udev as create only container in system-docker

Reboot after os upgrade

Don't symlink docker location, store at /var/lib/[system-]docker

Switch build env to ubuntu:14.04.2

Revert SIGCHLD behaviour

Update Docker for SIGCHLD handling