sz - change review table to a join table to connect movie and user
sz - improve tests
Merge pull request #10 from solowolf21/8_ManyToMany

8 many to many
sz - add joint model like
sz - add tests for like relation
sz - make like, unlike works, user can only like a movie once
sz - add tests for likes_controller and movies_contrller
Merge pull request #12 from solowolf21/9_Through

9 through
sz - add genre and charaterization
sz - add tests for genre and movie controller
sz - improve the style