Reorganized routes into 'routes.js'
Routes working correctly from ROUTES config file.
No serves JSON object of real data from new Users model.
Added model for 'Races', tested, serves data correctly.
Added 'Race Users' model and route.

Serves to /race_users successfully.
Changed case of Race_Users to raceUser.
Merge pull request #6 from lindsbot/backEnd

Added models for users, races, race users. Added routes for each. All functioning.