Fix related container border spacing

### Before

![screen shot 2014-08-15 at 11 54 07](https://cloud.githubusercontent.com/assets/85783/3932470/e80a7a28-246a-11e4-9002-e21786adaae9.PNG)


### After

![screen shot 2014-08-15 at 11 53 22](https://cloud.githubusercontent.com/assets/85783/3932474/eab20ce6-246a-11e4-95b0-d06b8176a950.PNG)

![ ](http://media.giphy.com/media/UhVRDSwRyMoM/giphy.gif)
The vertical space between two stories is 20px, and this puts the line in between. It's not related to the baseline so I'd thought I'd just write "10px".