0.6 | Add a way of fetching all teachers

Changes

• 2021-02-14 ❯ Fix EduGradeEvent
• 2021-02-17 ❯ Add a way of fetching all teachers, add better time functions
• 2021-02-17 ❯ Remove debug print
• 2021-02-17 ❯ Remove pprint as a dependency

— @BelKed