Universal Header

Adds the new G5Header engine and styles a new sub header bar.  https://www.pivotaltracker.com/story/show/82755500

![image](https://cloud.githubusercontent.com/assets/486358/5381687/944b249c-8058-11e4-8684-444ca44cd371.png)




![image](https://cloud.githubusercontent.com/assets/486358/5381708/b09c3b90-8058-11e4-9f0e-6dcb3826cbe1.png)