Set up configurable output formats in MPD widget
Set up configurable output formats in MPD widget

Closes #272

jdowner/qtile,aniruddhkanojia/qtile,ramnes/qtile,farebord/qtile,encukou/qtile,StephenBarnes/qtile,tych0/qtile,zordsdavini/qtile,qtile/qtile,dequis/qtile,tych0/qtile,aniruddhkanojia/qtile,rxcomm/qtile,cortesi/qtile,kopchik/qtile,kseistrup/qtile,himaaaatti/qtile,qtile/qtile,ramnes/qtile,kiniou/qtile,de-vri-es/qtile,EndPointCorp/qtile,kopchik/qtile,andrewyoung1991/qtile,flacjacket/qtile,himaaaatti/qtile,EndPointCorp/qtile,xplv/qtile,de-vri-es/qtile,soulchainer/qtile,zordsdavini/qtile,nxnfufunezn/qtile,encukou/qtile,xplv/qtile,kiniou/qtile,w1ndy/qtile,apinsard/qtile,frostidaho/qtile,w1ndy/qtile,apinsard/qtile,nxnfufunezn/qtile,kseistrup/qtile,cortesi/qtile,rxcomm/qtile,andrewyoung1991/qtile,kynikos/qtile,kynikos/qtile,farebord/qtile,dequis/qtile,frostidaho/qtile,StephenBarnes/qtile,soulchainer/qtile,jdowner/qtile,flacjacket/qtile