Update the readme for gatsby-dev-cli (#820)
Update the readme for gatsby-dev-cli (#820)


ChristopherBiscardi/gatsby,mingaldrichgan/gatsby,mingaldrichgan/gatsby,chiedo/gatsby,0x80/gatsby,fk/gatsby,gatsbyjs/gatsby,chiedo/gatsby,mickeyreiss/gatsby,chiedo/gatsby,mickeyreiss/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,danielfarrell/gatsby,danielfarrell/gatsby,ChristopherBiscardi/gatsby,Khaledgarbaya/gatsby,okcoker/gatsby,fabrictech/gatsby,okcoker/gatsby,gatsbyjs/gatsby,danielfarrell/gatsby,0x80/gatsby,gatsbyjs/gatsby,mingaldrichgan/gatsby,fk/gatsby,Khaledgarbaya/gatsby,fabrictech/gatsby,fabrictech/gatsby,Khaledgarbaya/gatsby,ChristopherBiscardi/gatsby,okcoker/gatsby,gatsbyjs/gatsby,fk/gatsby,mickeyreiss/gatsby,ChristopherBiscardi/gatsby,0x80/gatsby