Linked content card fixes

- Fixes a problem where a link in the first paragraph would go on top of the byline if the article has no primary image.
- aligns the cards on the proper grid (4 additional pixels to the left)

## Before

![screen shot 2013-08-12 at 13 26 03](https://f.cloud.github.com/assets/85783/947164/1eaf4d34-034b-11e3-9b48-6b695e3ec062.PNG)


## After

![screen shot 2013-08-12 at 13 29 09](https://f.cloud.github.com/assets/85783/947159/0041b29c-034b-11e3-9340-0929173fe96c.PNG)


![Bush dodge](http://i.imgur.com/xseYJnw.gif)