README: use relative links
README: use relative links

JBouron/bspwm,medisun/bspwm,baskerville/bspwm,nfnty/bspwm,baskerville/bspwm,nfnty/bspwm,medisun/bspwm,Stebalien/bspwm,Stebalien/bspwm,medisun/bspwm,JBouron/bspwm,JBouron/bspwm,nfnty/bspwm