Added failed_evaluations property to StudentProject model. This is used to store GradingRecords which state a fail for this project. It's a list because manual changes in GradingRecords might force multiple GradingRecords to state a fail. Also it needs to be clear which GradingRecords have been processed and with which grade_decision.

"""
Create a superuser from the command line. Deprecated; use manage.py
createsuperuser instead.
"""

if __name__ == "__main__":
    from django.core.management import call_command
    call_command("createsuperuser")