Author, logo

* Add logo
* Add "Design by" in footer

![nav](https://cloud.githubusercontent.com/assets/2317604/5444470/ce28c2cc-8478-11e4-8a78-2bee4f30e5cc.gif)

![footer](https://cloud.githubusercontent.com/assets/2317604/5444472/d0c31e9c-8478-11e4-8077-e3052a5d9407.gif)