added fields on metacategories, annotations to track the validation state of the annotation, with example handler in signals that check and update the state when a relevant metacategory is posted.
#!/usr/bin/env python
import os
import sys
if __name__ == "__main__":
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "iconolab.settings.dev")
from django.core.management import execute_from_command_line
execute_from_command_line(sys.argv)