Assignment submission and export report

1.2.0
Initial release

1.2.2
Removed a load of unused strings
Added extension date to report
Added due date to 'export all' report

1.2.4
Tested (and working) with 3.5 and 3.6
No functional changes

1.2.5
Fixed bug where grader is shown instead of marker
Show marking workflow, grader and marker in report

1.2.6
Rewrote the way all Assignments are loaded
Prevents error on assignment deletion

1.2.7
Improved display of buttons etc.
Participant number is now always displayed for anonymous Assignments
Option to add extensions directly from report
Bug fixes