Vendoring Gophercloud for Rackspace host commands.
First cut at a Rackspace host driver.
Allow a manually-specified server name.
Whitespace touchup :lipstick:
List images if --rackspace-image is wrong.
Ditto for flavors.
Image list formatting :lipstick:
CoreOS images use "core", others use "root".

As far as I know, anyway.
Support Ubuntu and CoreOS.
Pull the latest docker.
Updates for our latest Gophercloud version.