Creates a rotten tomatoes table, with rt movie id #
Adds rotten tomatos rake task, to pull in new movies

 - pulls in new box office and top rental movies
 - saves to db
 - creates category and rotten tomatoes object in db
 - can use rotten tomatoes object to search rotten tomatoes
   api for more info about that movie (using the rt movie id)
Removies categories views, and updates return_movies method to sort by category

 - previously was using categories views to sort by category
   (which wasn't DRY)
 - now genericized return_movies method to return correct
   movies based on category
 - for some reason associations are not correct, cannot do
    Category.where(category: 'box_office').movies
 - instead manually created an array of movies with a particular
   category