Added additional ratings to the ratings table and additional attributes to users and courses, as a result database-new needs to be rewritten
added boilerplate for the 23 new methods, dear lord
Implemented the 8 fetch methods
Updated ratings with some additional information a user can add about when they took the course and with whom
added a delete relation with ratings so that all associated ratings are removed when a user deletes their account
Finally figured out the right way to do this, using dictionaries and if statements.  I assume there exists a better way, but I'm not absolutely certain