Update README with internal link to HARDWARE.md
Update README with internal link to HARDWARE.md

alexvoronov/geonetworking,RNDITS/geonetworking,Heuvendw/geonetworking,Zeverin/geonetworking,Heuvendw/geonetworking,RNDITS/geonetworking,Heuvendw/geonetworking,RNDITS/geonetworking,alexvoronov/geonetworking,Zeverin/geonetworking