Add new minimal music widget.

https://dl.dropboxusercontent.com/u/56034188/Screenshot_2014-01-09-13-35-57.png
<- like that.

all widgets >
https://dl.dropboxusercontent.com/u/56034188/Screenshot_2014-01-09-13-37-33.png
Merge pull request #4 from spacecaker/master

Add new minimal music widget.