Add parentTemplateFile to routes as potentially useful
Add parentTemplateFile to routes as potentially useful

Fixes #139

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