Some queries not caught

[jgbishop]

I've noted that a few queries aren't caught by this (terrific) plugin. Specifically, some of the Django-specific queries don't seem to show up in the output:

• select ... from django_session
• select ... from auth_user

Other middleware that logs SQL queries seem to catch these queries, so it's definitely possible. I think the issue may be that callproc isn't implemented in the CursorDebugWrapper class, and perhaps those canned queries are stored as procedures.