Fixed unit creation bug.
Removed redundant find default unit method.
Code clarity fixes for task and unit creation.
Added report feature, fixed incorrect sender bug.
Fixed bug where gradings weren't being properly imported.
Fixed bug with email not sending due to config error. Improved dry run set up. Fixed rendering for non-fixed-width fonts.
Fixed bug with file attachments on notifications.
Fixed glitch with grade report
Updated folder structure
Take mean of all peer grades in task summary report.