README tweak to make it real js, match 0.8.x API
README tweak to make it real js, match 0.8.x API

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