Readme: Add pkg-config dependency (#438)
Readme: Add pkg-config dependency (#438)

Follow up #432
Also documented addition depenencies for OSX
hkoka/foxbox,fabricedesre/foxbox,fabricedesre/foxbox,cr/foxbox,npark-mozilla/foxbox,hkoka/foxbox,hkoka/foxbox,npark-mozilla/foxbox,cr/foxbox,aosmond/foxbox,Yoric/foxbox,fabricedesre/foxbox,Yoric/foxbox,Yoric/foxbox,fxbox/foxbox,cr/foxbox,aosmond/foxbox,fxbox/foxbox,hkoka/foxbox,cr/foxbox,npark-mozilla/foxbox,Yoric/foxbox,fxbox/foxbox,npark-mozilla/foxbox,fxbox/foxbox,aosmond/foxbox,fabricedesre/foxbox