Update README for 1.0 branch
Update README for 1.0 branch

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