Responsive home page

Removes press section and improves newsletter form at the top of the page.

## Before

![screen shot 2014-06-06 at 4 44 14 pm](https://cloud.githubusercontent.com/assets/667753/3202516/7efa6f76-ed91-11e3-8238-e78ff7e8c6ce.png)

## After

![screen shot 2014-06-06 at 4 43 03 pm](https://cloud.githubusercontent.com/assets/667753/3202520/83a5d6a0-ed91-11e3-95bf-6dc2b8af464b.png)