Code review comment for lp://staging/~axwalk/juju-core/lp1167441-report-instance-state

Is it possible to call the function "Instance.Status()"? We have a bit
of an overload of State things, and it would be one case less.

I think the reasoning might be that the status command outputs 'state:
pending' but avoiding the word State() in an interface seems useful to
me.

https://codereview.appspot.com/12333043/