Setup a working, if insecure, chef config with EC2 support.
Update alpha environment to setup DB user & create DB.

With a better understanding of how the recipes currently work, I removed
a hard-coded postgres password (one will be generated and stored in Chef
on boot) and correctly formatted the environment so that the
rails:databases recipe can work.
Adjust some configs, move secrets to an encrypted data bag.
Update rails cookbook version, and alpha env.