Feature/d3 partition

I updated the styling a little bit by adding a new tab for the visualisation that when clicked will show it 'full screen' to make the best use of the screen space. Also fixed a small JS error that happened when tabs were switched between.

See:

![screen shot 2014-02-01 at 14 31 17](https://f.cloud.github.com/assets/640960/2057797/ef2a62a2-8b4d-11e3-9fed-b91b71717222.png)

![screen shot 2014-02-01 at 14 31 32](https://f.cloud.github.com/assets/640960/2057800/f7adfe98-8b4d-11e3-94ed-a994717679c4.png)