Improve login Screen and layout

Hey Robin, I made a few changes in your layout and also added a single_rake task to create an admin.
![screen shot 2014-02-01 at 7 22 40 pm](https://f.cloud.github.com/assets/524320/2058388/8dbda7be-8b6f-11e3-9789-53bb6bb8dd37.png)
![screen shot 2014-02-01 at 7 23 13 pm](https://f.cloud.github.com/assets/524320/2058389/8fe7e590-8b6f-11e3-9c1e-4cc2e6dcf08a.png)
I didn't edit all the views yet though ...

Tell me what you think about the layout. :beers: