added margin support in tile layout
added margin support in tile layout

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