draft code; returns 404 error
got post routes to not give 404 error; still don't work, though.
Merge branch 'develop' of https://github.com/PlantAlert/PlantAlert_backend into city-routes
makes a new city and adds a user to the user array; doesn't create cityName
added city schema
two versions of city routes code; version 1 passes first test
working addcity route and passing tests
removed commented out code
removed notes_test file
Merge pull request #13 from PlantAlert/city-routes

City routes