added extra menu items when logged in

This adds a new variable in the IndexController for `$logged_in`. Then I added a 2 new menu items for *when a user is logged in*. One to access the user/admin panel, then one to logout.

![screen shot 2014-11-15 at 12 37 46 pm](https://cloud.githubusercontent.com/assets/1425304/5058570/3fdde5e0-6cc4-11e4-8e43-7c72f1bd44a4.png)