Summarize data

Please, check my code!
I forgot to include some kind of readme.st. To test custom command:
python manage.py summarize [date YYYY-MM-DD] [--nodeletion]
If you pass no parameters it summarizes current date minus 15 days (single day and no a 15-days period)
@haplo If I remove it that's what I get:
Unknown command: 'summarize'
Type 'manage.py help' for usage.
You meant that I should have put the whole management tree inside requestinfo app, isn't it?