Books component - new design

- Implemented the new design for the books component
- Moved the common styles over to the `_commercial-component.scss` file

![3_desktop](https://f.cloud.github.com/assets/1148714/2459095/a5bf0e48-af55-11e3-97df-dfc330dcdccd.png)
![0_mobile](https://f.cloud.github.com/assets/1148714/2459096/a943cc8e-af55-11e3-8975-d0b8199f17aa.png)