Ready: Strong consistency update

- [x] Configs in `advanced.config`
- [x] `riak-admin` interface for ensemble
- [x] Implementation details

Heads up to @andrewjstone, @engelsanchez, and @jtuple when he's back.
I'm going to have to work on this recommendation with you also. We Need to come up with something more accurate according to our current recommendations. probably best to ask in hipchat.