Gradescope Add to Calendar

Gradescope Add to Calendar Button Source available on https://github.com/calvinatian/gradescope-add-to-calendar-button Adds a button to create calendar events next to all Gradescope assignments. Uses https://github.com/add2cal/add-to-calendar-button to generate links. Currently: - Adds calendar button to all courses user is enrolled in as a student on gradescope.com - Button to the right of date column - Default styling on calendar button