Login/Logout and Account moved into navigation

I tried some alternate designs to solve the login button problem. However, I ended up moving them in the navigbation bar as it looked best and was the best option for mobile. Fixes #156 

![selection_005](https://cloud.githubusercontent.com/assets/1288339/4131391/02af5742-3346-11e4-93d8-afd2f66b3c92.png)
![selection_006](https://cloud.githubusercontent.com/assets/1288339/4131392/043ac83a-3346-11e4-9897-f5e0ec2da006.png)

Sorry for the messed up css dfiff. I will have to disable the verbose css output of sass to prevent that.