Collection latest updates

This adds auto update functionality to the containers on the fronts. We long poll a facia endpoint in the background and if there are new edits to the fronts since the page was initially loaded, a call-to-action is displayed to reload the content.

### Example
![untitled](https://cloud.githubusercontent.com/assets/80089/4719468/f29bfdc4-5929-11e4-889b-cb006bf8f37b.gif)

### Mobile
![google chrome](https://cloud.githubusercontent.com/assets/80089/4719508/327a969e-592a-11e4-94b7-d2fc118240a8.png)


Nope this is very much a progressive enhancement, so failing silently is fine with me.