Product pages layout redesign

Current layout
![old](https://f.cloud.github.com/assets/50206/2493135/702901a0-b27d-11e3-8baa-e1f07877503b.png)

Suggested layout
![new](https://f.cloud.github.com/assets/50206/2493136/79ece526-b27d-11e3-85ff-a9e9fce28580.png)