Byline picture

This adds the new large crop byline pictures to our content model and displays them on content pages if available.

We have also re-factored the byline and meta data layout for each content type based on Chris P's new designs.

#### Before mobile
![screenshot from 2014-03-04 15 53 31](https://f.cloud.github.com/assets/80089/2322796/2c1a3442-a3b5-11e3-83b6-fba5b341410e.png)

#### Before Desktop
![screenshot from 2014-03-04 15 53 17](https://f.cloud.github.com/assets/80089/2322798/2f1ec270-a3b5-11e3-811e-730943e32c0f.png)

#### After mobile
![screenshot from 2014-03-04 15 48 28](https://f.cloud.github.com/assets/80089/2322807/3a677780-a3b5-11e3-8a07-bede2b87a370.png)

#### After desktop
![screenshot from 2014-03-04 15 48 51](https://f.cloud.github.com/assets/80089/2322804/35ab4bb8-a3b5-11e3-88e2-fd23d02a9e20.png)