Minor updates to the core theme

![image](https://cloud.githubusercontent.com/assets/596029/4905669/69ba1ff2-6452-11e4-8d42-eb9289011caf.png)

and the slim:
![image](https://cloud.githubusercontent.com/assets/596029/4905999/05038186-6455-11e4-8033-9947bff03602.png)

@Ferdi @pdpinch @JoeMartis @itsbenweeks