Vagrant router integration and updated readme

This PR addresses https://trello.com/c/cQf9jDeE/555-3-provide-readme-and-vagrant-setup-for-routing.

Features:

1. readme detailing full router setup
2. integration with vagrant single machine environment
3. integration with vagrant clustered machine environment where the router is placed on a new, unregistered minion
@pmorie I don't think this will work in AWS.