Dont remove known_hosts

Was a fixme that needed to get cleaned up. Was meant for testing
purposes.

Fixes #126

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
Fix OpenStack case in readme

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
add `--version`

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
Fix order in which first interface in container is disabled and removed
properly

Fixes #251

Signed-off-by: Adam Stokes <adam.stokes@ubuntu.com>
consolidate landscape and multi uninstall paths