Commercial single dfp unit styling

This adds the required styling for single unit commercial units created within DFP.

Html template is created in DFP and creatives are made in DFP. Separate pull request coming to store these templates and to give a test page.

Works across both fronts and articles at all breakpoints

![screen shot 2014-06-20 at 15 11 07](https://cloud.githubusercontent.com/assets/1303616/3341040/cce3c2de-f884-11e3-8232-3cea67c3ab74.png)

![screen shot 2014-06-20 at 15 10 34](https://cloud.githubusercontent.com/assets/1303616/3341028/aeeeec90-f884-11e3-8daa-9b00e9547f73.png)