Rooms and events route

[TyHil]

Adds new routes to:

• get all rooms being used as classrooms in the current and future semesters
• get all the sections with class in a day by building and room
  • get all the sections with class in a day in a specific building, by room

[jpahm]

@TyHil Updating this branch now. It looks good to me so far, feel free to undraft it when you feel it's ready for a final review and merge. Same goes for #252.

[TyHil]

Sounds good. It'll be ready with the changes @recursiveTurtle is working on for the rooms route.