Mg center logo nav


![image](https://cloud.githubusercontent.com/assets/2095625/3552269/7eadefd8-08f4-11e4-9429-d20449e0e9f1.png)


![image](https://cloud.githubusercontent.com/assets/2095625/3552263/76bda534-08f4-11e4-80ef-2437cd1a7b52.png)