poke_ops: Boot, inspect, and terminate instances.
poke_ops: Boot, inspect, and terminate instances.

Update poke_ops so that virtual machines can be booted, inspected,
and terminated.  I suspect we'll start with 4 micro VMs that we'll
install docker on or something.

secant/quilt,kelda/kelda,quilt/quilt,kelda/kelda,NetSys/quilt,LuiseV/quilt,kklin/quilt,secant/quilt,stevenlin598/quilt,stevenlin598/quilt,kayousterhout/quilt,PenguinToast/quilt,kelda/kelda,kklin/kelda,kklin/quilt,mmussomele/quilt,secant/quilt,tejasmanohar/quilt,kelda/kelda,ejj/quilt-dev,stevenlin598/quilt,tejasmanohar/quilt,LuiseV/quilt,kklin/quilt,kayousterhout/quilt,kklin/kelda,mmussomele/quilt,NetSys/quilt,mmussomele/quilt,PenguinToast/quilt,mmussomele/quilt,kayousterhout/quilt,quilt/quilt,ejj/quilt-dev,PenguinToast/quilt,stevenlin598/quilt,NetSys/quilt,LuiseV/quilt,ejj/quilt-dev,PenguinToast/quilt,LuiseV/quilt,quilt/quilt,NetSys/quilt,secant/quilt,kklin/kelda,stevenlin598/quilt,akshayknarayan/quilt,LuiseV/quilt,ZhongtianWang/quilt,stevenlin598/quilt,mmussomele/quilt,tejasmanohar/quilt,ejj/quilt-dev,tejasmanohar/quilt,NetSys/quilt,ZhongtianWang/quilt,kklin/kelda,akshayknarayan/quilt,quilt/quilt,secant/quilt,mmussomele/quilt,kklin/quilt,akshayknarayan/quilt,akshayknarayan/quilt,ZhongtianWang/quilt,kayousterhout/quilt,ZhongtianWang/quilt,PenguinToast/quilt