Merge pull request #22 from mmerkes/login_flow

Updated GET /neighborhoods/:neighborhood?address=address
Fixed the fix of the fix. --workers defaults to 0, which converts to an integer all of the time (sic.)
Add POST /neighborhoods/:neighborhood/notify-me to store emails for users in unsupported neighborhoods
Merge branch 'master' of https://github.com/sebmartel/s2g-server into login_flow
Add POST /neighborhoods/:neighborhood/notify-me to allow users to provide email to be contacted when neighborhood supported