Fixed open redirect.
Merge branch 'fix-open-redirect' into redesign
Added login/logout URLs to index template.
Reworked new account page.
Added navigation bar to homepage.
Added new staff workflow.
Correct staff/admin links on home page.
Added new-teacher workflow.
Created new add-class form.
Added class list & new class creation to staff page.
Added apached LICENSE file.
Added license boilerplate.
Merged master.
Implemented class deletion.
Added class rescheduling.
Grouped classes by day on the staff portal.
Started working on registration logic.
Cleaned up some naming.
Finished session registration.
Added registration display to homepage.