guardian/frontend — pull request #5767 by ironsidevsquincy (2014-08-29 09:15:57+00:00)
Title: Gallery ads

Add adverts to the gallery page (after every 4th image)

![screen shot 2014-08-29 at 10 13 44](https://cloud.githubusercontent.com/assets/74132/4088418/df953052-2f5c-11e4-9855-ee0c85984b74.png)