Fix: Corrected bug that prevents non-admins from being unable to submit quizzes.
Change: Added a message to remind users to check e-mail spam box.
Change: usernameRegistered() now returns a boolean + added function documentation.
Change: Rework usernameRegistered() to return a user ID.
Add: Implemented function to get a users e-mail address.
Add: Implement e-mailing behind the recovery system.
Optimization: Clean-up code to be much less scope heavy.
Change: Send a sender name along with the e-maill address.
Add: Include links to the recovery page.