New mobile design

New theme/design as part of version 2.

![music server mobile concept v2_currently_playing](https://cloud.githubusercontent.com/assets/7483203/10387781/8b4bea98-6e64-11e5-90b9-97442f30da45.png)
![music server mobile concept v2_start](https://cloud.githubusercontent.com/assets/7483203/10387782/8b4c6bda-6e64-11e5-8c19-a33c298c5550.png)
