README: add chromeless option
README: add chromeless option

shakin/clappr,Metrakit/clappr,shakin/clappr,burakkp/clappr,MariadeAnton/clappr,clappr/clappr,jfairley/clappr,tjenkinson/clappr,Peer5/clappr,wxmfront/clappr,wxmfront/clappr,burakkp/clappr,jfairley/clappr,shakin/clappr,kelonye/clappr,Pyrotoxin/clappr,Metrakit/clappr,wxmfront/clappr,MariadeAnton/clappr,flavioribeiro/clappr,tarkanlar/clappr,tjenkinson/clappr,irongomme/clappr,Metrakit/clappr,leandromoreira/clappr,Peer5/clappr,MariadeAnton/clappr,Pyrotoxin/clappr,irongomme/clappr,tarkanlar/clappr,kelonye/clappr,clappr/clappr,irongomme/clappr,clappr/clappr,tarkanlar/clappr,kelonye/clappr,Pyrotoxin/clappr,dayvson/clappr,jfairley/clappr,dayvson/clappr,leandromoreira/clappr,dayvson/clappr,flavioribeiro/clappr,leandromoreira/clappr,burakkp/clappr,Peer5/clappr,flavioribeiro/clappr,tjenkinson/clappr