Add link back to topic from latest page

Update to https://www.pivotaltracker.com/story/show/79185352

- Provides a link back to the topic via the breadcrumbs
- Changes the title of the page to more accurately reflect what it is, following the pattern in Whitehall.

Before:
![screenshot 2014-11-13 14 43 35](https://cloud.githubusercontent.com/assets/109225/5030084/bf7f4ee6-6b44-11e4-9af8-4e8c9fa4ed8f.png)

After:
![screenshot 2014-11-13 14 43 42](https://cloud.githubusercontent.com/assets/109225/5030087/c8aec014-6b44-11e4-8286-b0619a618c5a.png)

This does not follow the mockup as this is a subpage of the topic, so we're following Whitehall's pattern eg https://www.gov.uk/government/latest?departments%5B%5D=cabinet-office