Comment 2 for bug 1167441

I've made a start on this. I've added a Status method to instance.Instance, and all implementations thereof. The only ones that will return a non-empty string are azure, ec2, openstack, and container/lxc.

I can't see any way of getting a machine status from MAAS. Local is always running, of course, so I'll just leave it as blank (which is omitted by juju status).