Sphinx format documentation

Hey,

I have added Sphinx docs based on README with a few layout changes, no real change to the content. This is the format that http://readthedocs.com expects the documentation so you should be able to set it up to automatically pull from this repo. It might also be worth updating the README file with the correct link to the documentation.

I intend to write more documentation and clear a few things up if that sounds like something you would be interested in.

All the best,

Chris Franklin