Posts are paginated

https://trello.com/c/JolQub46/17-as-a-user-i-can-view-posts-in-a-paginated-list

![screenshot from 2014-11-05 16 16 26](https://cloud.githubusercontent.com/assets/8154429/4926161/0610d542-6531-11e4-8ebb-4b30c2d23494.png)