Adding support for the Rackspace Open Cloud
Merge remote-tracking branch 'amesserl/raxcloud-support'

Conflicts:
	Vagrantfile
Fix missing group "Vagrant" error
Merge remote-tracking branch 'upstream/master' into HEAD

Conflicts:
	README.md
Merge pull request #135 from amesserl/raxcloud-support

Added support to use docker with Rackspace Cloud Servers