Basic moderation and reports

Created by: Amersel

This adds rudimentary support for moderation and an experimental version of a report system.

Moderation only supports deleting threads and posts, with more work on deleting images planned.

The reports system requires a second database for ayase related reports. It differs from the system Foolfuuka uses, particularly since this reports system uses rule sets which you enable with checkboxes on the ui (which is not working yet).

I originally wanted to merge this later when this was more complete, but with the other branches being worked on (notably toml support) it's becoming too complicated to keep these branches in line.