Support for arbitrary nova ip pool names.
Support stock openstack instead of rackspace.
added support for gophercloud's PopulateApi
added support for floating ips

Allows floating ips to be used to ssh into more secure vms via packer
Initial custom hack to get working with Nebula cloud.
Add support for standard OpenStack environment variables
Add OpenStack API key support
Append /tokens suffix if not present for specific OpenStack authentication URLs