Add support for a new option to the openstack inventory. This is so
should one cloud be unavailable you can still list hosts from any
other openstack clouds you have configured.
This is exposed as an option under the extra config part of ansible
in the openstack clouds.yaml.
The OpenStack inventory lists hostnames as the UUIDs because hostsnames
are not guarnateed to be unique on OpenStack. However, for the common
case, this is just confusing.
The new behavior is a visible change, so make it an opt-in via config.
Only turn the hostnames to UUIDs if there are duplicate hostnames.
renamed plugins to contrib (they are not really plugins)
rewrote README.md to reflect new usage
added new dir to setup.py so it gets copied with installation, in views
of making using inventory scripts easier in teh future
