New design

First pass at implementing the new design as per Adrian's mockup. Here's some screenshots:

## Homepage

![homepage](https://cloud.githubusercontent.com/assets/109774/2579851/45810f94-b9a6-11e3-8dfc-16bb4a2ff90f.png)

## Example of the a listings page

![listing](https://cloud.githubusercontent.com/assets/109774/2579857/61d27bf6-b9a6-11e3-97ae-05aba53dc5ab.png)

## News item

![news](https://cloud.githubusercontent.com/assets/109774/2579869/86255672-b9a6-11e3-9a80-a5206e8057ff.png)

Still need to fix the favicon (vital work!) and the responsiveness of the hero image, so not quite ready for merge!