Merge pull request #11 from gspilio/unable_to_parse_fix

Unable to parse fix
Merge pull request #12 from gspilio/reload_config

Reload config
Merge pull request #18 from gspilio/unable_to_parse_fix

Unable to parse fix
Merge pull request #19 from gspilio/per_exercise_due_date_and_grace_period

Per exercise due date and grace period
hotfixes to make assignment part due dates work - need to write tests that properly check this
specs wrapping strings in assignment part configuration and fix to grace period in assignment part configuration