Week 4 Release Notes

@CalvinWagner05 : finished leaderboard, started working on flashcards carousel
@wyatt-lyda: finished functionality for course buttons, added pause/resume on timer, added time spent on question
@benwillcutt: implemented streak feature, added ability to have starter code for coding questions, saves code that users submitted for a question, added tests for the website profile page
@TenorPanther: made modals for flashcard editing, added ability to add flashcards
@chfe8281: implemented get request for coding questions, post request checks exact question sent from the get request (instead of hard-coded question), bug fixes after MCQ merge
@Ponippp: got MCQ working on server, added MCQ questions, added question sets functionality