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 just read over this whole config file. I know you we're concerned about readability @lucperkins but this looks great to me. Fine as is. Great job!