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
I will return this line to its previous position (clustered env only).  Since the requirement is now changed to not perform the provisioning during vagrant up I no longer need this to be scoped outside the clustered environment.