When profiling pages, just having the python profile isn't very helpful if 99% of the time is spent in database queries. This change adds the ability to track SQL queries (and where they came from). This isn't quite as awesome as it could be regarding settings.DEBUG, but I need to think about the best way to do that. django doesn't make it easy to replace the CursorDebugWrapper in a sane way.

Ran with this code and looked at profiling information.