Demo and Installation information added to README
Demo and Installation information added to README

dlecina/StayPuft,renattomachado/StayPuft,RisingStack/StayPuft,janocat/StayPuft,CAYdenberg/StayPuft,CAYdenberg/StayPuft,renattomachado/StayPuft,arangas/StayPuft,Gaisuru/StayPuft,happyfunboy/ghost_theme,ugurcan377/StayPuft,TheFynx/StayPuft-Dark,dlecina/StayPuft,TheFynx/StayPuft-Dark,arangas/StayPuft,Gaisuru/StayPuft,cshutchinson/twilightfactor,cshutchinson/twilightfactor,happyfunboy/ghost_theme