-Fixed broken javascript on the calendar.php
-Added proper ajax request to return absent users to viewclass.php (to be used for the calendar popop)
-Fixed the absent students query where it returns incorrect results in certain situations
-Added effects to calendar. Class days shown in green, # of absent students shown only on class days.
-On click ajax request on the calendar now works properly. We just need the info it is pulling to be displayed in a jquery UI modal window.