Added README warning about firmware upgrade
Added README warning about firmware upgrade
sinnottj/lifxjs,WigWagCo/lifxjs,wiegraff13/lifxjs,ryanj/lifxjs,WigWagCo/lifxjs,ppelleti/lifxjs,ryanj/lifxjs,magicmonkey/lifxjs,wiegraff13/lifxjs,magicmonkey/lifxjs,ppelleti/lifxjs,sinnottj/lifxjs