WIP: Initial Skeleton implementation.

In an effort to maximize space and standardize layout (and CSS), I've come to this initial step:
![image](https://cloud.githubusercontent.com/assets/238667/5395739/652395ce-814c-11e4-8ed2-a0f84ea1a3b8.png)

The footer needs a bit of work still, but the main benefits here are, in descending order:
- removing **a lot** of the manual CSS fiddling/cruft, which significantly hampered layout/styling,
- more horizontal space for upcoming facets,
- better vertical grid alignment, following 24px where possible,
- removing jQuery UI wherever possible, it's a huge dependency we don't need,
- using a responsive ready framework, which should make it relatively easy to make the website mobile friendly

Before:
![image](https://cloud.githubusercontent.com/assets/238667/5395788/d4095ab4-814c-11e4-97f6-d7ab1d5287f5.png)

I only just begun cutting out the CSS that is no longer needed, because the Skeleton framework takes care of it (things like columns, sane padding, margins, etc.). This will definitely make it a lot easier for anyone to come and fiddle with the app/add new features.