Facia: single inline ad slot

No longer have two slots (one mobile, one desktop), as screws up DFP in a number of ways (e.g. makes two calls). DFP is, after all, responsive, so lets use it

Side effect is ad moves above the show more '+' button. Lets see how bad that it (moving it below the button was never a strong requirement, just something the editors mentioned)

![screen shot 2014-04-01 at 12 49 26](https://cloud.githubusercontent.com/assets/74132/2578606/bd2de340-b993-11e3-8ea8-164280e3e81d.jpeg)