Changed formatting a bit
Changed the default time_zone to be pacific
Updated some status functions, and added the new string_to_status function
Made it so new submissions can't be made at all after grading has begun
Added status functionality for importing students
small cosmetic change
Fixed assign_grades method of assignment so it returns the number of submissions on a fail
Small cosmetic changes
Small cosmetic change in roster
Added helper method to statuses
Made auto-SID assignment for enrollment more robust. Fixed a possible bug in the original maybe
Added more enrollment capabilities. Can enroll single students. Also, updated header