Changed all status to start with Uppercase letters, made 3 properties required. Changed all the status to start with Uppercase letters because they are publicly visible. Also changed required=True to False for created_by, modified_by property to allow site admin to create and modify tasks. Also changed required=True to False for history to allow history not to be written until the task is published.

from django.core.management.base import AppCommand

class Command(AppCommand):
    help = "Prints the DROP TABLE SQL statements for the given app name(s)."

    output_transaction = True

    def handle_app(self, app, **options):
        from django.core.management.sql import sql_delete
        return u'\n'.join(sql_delete(app, self.style)).encode('utf-8')