go: add a README
go: add a README

marcuskara/basebuilder,emerleite/basebuilder,axelerant/basebuilder,jusbrasil/basebuilder,jusbrasil/basebuilder,axelerant/basebuilder,ChangjunZhao/basebuilder,keymon/basebuilder,keymon/basebuilder,keymon/basebuilder,keymon/basebuilder,jusbrasil/basebuilder,actionjack/basebuilder,tsuru/basebuilder,emerleite/basebuilder,emerleite/basebuilder,leandrosouza/basebuilder,keymon/basebuilder,marcuskara/basebuilder,actionjack/basebuilder,keymon/basebuilder,marcuskara/basebuilder,tsuru/basebuilder,ChangjunZhao/basebuilder,actionjack/basebuilder,axelerant/basebuilder,ChangjunZhao/basebuilder,keymon/basebuilder,leandrosouza/basebuilder,leandrosouza/basebuilder,keymon/basebuilder