Only class length is 50 minutes; Made update_class_by_user for edit_class.php; Update_class_by_user does not change scheduling or approval info
moved js for adding/removing teacher to functions.js; added add/remove functionality to edit_class
User can edit classes they have taught and classes they have submitted
Can add teachers from class submission page. Also remove_class also removes class from co_teachers;
start time always on the hour; added dropdown_number_array function
added hidden scheduling ability; changed the removal of room when class not accepted; all unaccepted classes highlighted on edit page