Enabled deployment of Flask app to AWS.

Added configuration files for deploying our simple app to AWS EC2 using nginx (proxy server) and supervisord (process control). Deployment facilitated using Fabric. The current deployment script is really rough and needs refinement, but it works with a new Ubuntu instance. The current app uses Flask's development web server, which we'll want to change later.

[Link to Test Server](http://ec2-54-213-173-105.us-west-2.compute.amazonaws.com)