Finish section lists

- Link up pages from navs
- Add arrows to lists of sections
- List styling per design

Before:
![screen shot 2014-04-28 at 10 22 43](https://cloud.githubusercontent.com/assets/68009/2815204/bc01af00-ceb6-11e3-9204-08dea8c5d6ec.png)
![screen shot 2014-04-28 at 10 22 51](https://cloud.githubusercontent.com/assets/68009/2815207/bdd43f32-ceb6-11e3-90ae-7807a01eed59.png)

After:
![screen shot 2014-04-28 at 10 22 28](https://cloud.githubusercontent.com/assets/68009/2815209/c9944290-ceb6-11e3-9703-992c254bceb5.png)
![screen shot 2014-04-28 at 10 22 16](https://cloud.githubusercontent.com/assets/68009/2815208/c4793a4a-ceb6-11e3-821b-969a8da6b6bd.png)

Work still to do for this ticket (https://trello.com/c/DB87xpzl/40-manuals-static-manual-in-beta-for-hmrc-content-page-3):
- Refactor @document use in view into a presenter
- Add hover state to list items
- Add open all link