feat(server): enable fxa oauth login + save to db

Fixes #40, almost-kinda-fixes #24.

Changes of note:
  * I'm able to do the complete oauth-driven login flow locally \o/
  * Remove jscs rule requiring a space after `function`
  * Serve static bits from `/dist`, not `/app`
  * Add mozlog logging: heka compatible in prod, yet readable for local dev
Particularly ugly/dangerous TODOs:
  * Added DB creation and DB client, (barely) functional yet so ugly
  * Make outgoing HTTP requests from inside the route handler: reverse proxy
    needed
  * Not yet using a nonce to avoid replay attacks, because hapi sessions
    are so &#$%! unnecessarily complicated