Create developer documentation for the website.

[ntoll]

This should be Sphinx (http://sphinx-doc.org/) generated developer documentation for people of a technical disposition. Must include:

1. Description of technical processes.
2. Abstract definition of the drogulus.
3. Description of the HTTP/JSON based API that implements 2
4. Description of the Python implementation of 3
5. A guide for developing with the drogulus module
6. A guide for contributing to the drogulus
7. A guide for implementing the drogulus in another language