Commercial books high style

This makes the commercial high relevancy component work nicely on fronts as well as articles.

Before, (taken from live and forcing the add into the low relevance position)

![screen shot 2014-05-21 at 15 14 51](https://cloud.githubusercontent.com/assets/1303616/3041213/8fcabb40-e0f2-11e3-9578-f659bbac8108.png)

After;
![screen shot 2014-05-21 at 15 14 36](https://cloud.githubusercontent.com/assets/1303616/3041217/98397550-e0f2-11e3-8515-93f9ad547209.png)