Merge pull request #440 from avuton/master

A few small patches
Java 1.7 (hello Diamonds !)
MPDOutput should implement toString for convinience
Add outputs fragment
Add layout previews
Outputs fragment is now nicely integrated into the library. Welcome back !
Add "play queue" to the navigation drawer. Fixes #437
Fix license spacing issue
Move padding to the card itself
Android XML settings for arrangement
New about header
Update readme
About window overhaul
Remove unnecessary (and ugly) padding