Moved admin-related functions into admin-functions.php and professor-related functions into professor-functions.php
Renamed profile.php -> uProfile.php and schedule.php -> uSchedule.php
Renamed `admin_timeoff_open()` to `timeoff_open()` and moved it to functions.php
Functions
User can view requests they have made
Rearranged functions for hopefully better organization :p
Added `generic-list` CSS class
Reworded "Add New" text