New Cover design

Feel free to use or discard :)
Cover actions are just placeholders. I can do other icons for it if you
want. My idea for them would be:
Left icon = quit Mitäkuuluu or disconnect
Right icon = toggle between show show online and offline
more icons
adjusted cover.png

first version was too obtrusive
Merge pull request #173 from Morpog/master

New Cover design by Morpog