Add Unified header

Add first proposal for unified header. 
displayed on the infrastructure site. 
would propose it changes the color per page(red cip, green landing, grey shareabouts)
what do you think?
the logo needs some work. maybe I can ask a designer the next couple of days. 


![bildschirmfoto 2014-03-02 um 23 28 12](https://f.cloud.github.com/assets/688980/2305500/fc17cf2c-a259-11e3-84ca-f4f810895899.png)

![localhost_8000](https://f.cloud.github.com/assets/688980/2305503/1b943dfe-a25a-11e3-8bbb-cde32afee51a.png)