Additional styling for related content on galleries and liveblogs 

Fix for:

![screen shot 2014-11-26 at 13 03 42](https://cloud.githubusercontent.com/assets/2236852/5201625/ad16914c-756c-11e4-8367-9cd44be0607c.png)

![screen shot 2014-11-26 at 13 04 05](https://cloud.githubusercontent.com/assets/2236852/5201630/bad7f06e-756c-11e4-8412-eaef5fa937ce.png)

And removing the extra grey line:
![screen shot 2014-11-26 at 13 04 46](https://cloud.githubusercontent.com/assets/2236852/5201640/d5af1232-756c-11e4-996b-fac48a76aa59.png)