Correct backend model fields

[gannonprudhomme]

There are a few inconsistencies between the Django models that we need to fix:

Section:

• term_code: Should be changed to term

Course:

• dept: Probably change to subject
  • Alternatively, Section.subject should be changed to dept. Just need to be consistent.
• credit_hours: While it does make sense for a course to have credit_hours rather than the Section, we currently don't use it, so should consider removing it?

Meeting

• Might want to move web here, since classes like CSCE 121 - 599 (at the time of writing) have exams with an actual time, but the lectures are online.