Docker/fig development environment

This PR is using [Docker](https://www.docker.io/) and [fig](http://orchardup.github.io/fig/) to create a small and fast development environment based on an LXC container. The Docker container contains an Apache2 server that is running the code base on port 80. When used with `fig up` that port is exposed on port 5000 on the host machine (i.e. <http://localhost:5000/>).

(will be rebased once #6 is merged)