(fix) enables /api/tours/:id show tours with associated spots and fixes some tests
(refactor) moves api/tours/:city_name to api/city/:city_name
(inc) modifying make tour and reviews with authenticated users
(feat) embed the spots into tour model, removes spot model and routes
(feat) adds the authentication function before creates a new tour
(test) finishes test for create/update tour
(feat) adds /api/users/:id/tours to enable users see the tours created by themselves
(cleanup) clears the console log in test file
Merge pull request #53 from nrobeR/feat/tour

(feat) finishes basic routes for user&tour