fix(fonts): Use connect-fonts to serve up fonts locally.

fixes #110
Merge pull request #111 from mozilla/fonts

fix(fonts): Use connect-fonts to serve up fonts locally.
Add support for preVerifyToken generation.

To generate a preVerifyToken, visit <123done_host>/api/preverify-signup?email=<email>
Merge pull request #114 from mozilla/oauth-preverify-token

Add support for preVerifyToken generation.