[WIP] Deployment scripts

## What does this PR do?

This PR adds provisioning and configuration scripts for a staging (and later production) environment.

## What is included?

- `cloudformation.json`: is the the CloudFormation template that launches the stack. It includes one instance in a VPC with RDS. More instances with an ELB can be added for a more available environment.
- `puppet/`: Includes all the Puppet manifests. Libarian-puppet was used to download external modules.
- `Vagrantfile`: You _should_ be able to launch this environment whether you are in AWS or Vagrant. Vagrant still needs some tweaking.