Getting started page

@karlitschek @jospoortvliet @kelleybrooks

Looks like this currently. Made a guess at what kind of content we want on here. Thought I'd stop and give you guys a chance to comment on layout, headings etc.

![screen shot 2014-11-28 at 20 33 52](https://cloud.githubusercontent.com/assets/660805/5232072/352df5e8-773e-11e4-9047-8d47f2898808.png)