WIP: Responsive project site

Just kicking off a pull to improve on the new site design by way of making it a bit more friendly for smaller screens. I don’t anticipate huge portions of the audience will be viewing it on phones or tablets (chances are most people looking up the docs will be on their laptop/desktop, developing with Jekyll and need to look something up), but I’d rather it worked a bit better regardless.

:construction: Very much an early WIP. As it stands, this PR beats the site around a bit with an ugly stick. It’ll all come together eventually though…

![soon](http://1.bp.blogspot.com/-jyfj1KmnVLk/T0hrag8UDDI/AAAAAAAALAA/3rHJfFg6sN4/s1600/soon_meme_collection_640_14.jpg)