Add babel-register as dev dependency so AVA tests pass w/ npm 2
Add babel-register as dev dependency so AVA tests pass w/ npm 2

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