Restore latest skin on instanciation
Save current skin in HTML5 storage
Ability to switch between the 3 skins: added 3 buttons under the jukebox
Side effect: stored playqueues are lost
How to fix: edit your HTML5Storage and rename the `playqueues` key by `Jukebox-playqueues`
Remove prompt (modal window), use an input to set playlist name
New play controls layout