Add user.email to searchable scope of projects
Add user.email to searchable scope of projects

As [requested](https://github.com/neighborly/neighborly-api/issues/12#issuecomment-47950713)
by @snconnolly.

MicroPasts/micropasts-crowdfunding,MicroPasts/micropasts-crowdfunding,gustavoguichard/neighborly,gustavoguichard/neighborly,MicroPasts/micropasts-crowdfunding,MicroPasts/micropasts-crowdfunding,gustavoguichard/neighborly