Mark up summaries on homepage, add example of completed services

- Mark up the homepage as tables
- Add a design for completed services—toggled off in prod because it's not functional
- More design rationalisation in light of improvements to homepage

![screen shot 2014-10-06 at 08 45 14](https://cloud.githubusercontent.com/assets/355079/4524571/2a150196-4d46-11e4-8042-d0f2d752bbb7.png)

Not sure we need this paragraph as anchors can be block-level. Same for lines 5-7.