Fix mod actions to use the same message format everywhere.
Before mod actions were formatted in various inconsistent ways:
* "deleted post #1234"
* "comment #1234 updated by <user>"
* "<user> updated forum #1234"
* "<user> level changed Member -> Builder"
Now all mod actions consistently use this format:
* "deleted post #1234"
* "updated comment #1234"
* "updated forum #1234"
* "promoted <user> from Member to Builder"
This way mod actions are formatted consistently with other actions on
the /user_actions page, where everything is written as "<user> did X".
Also add a fix script to fix existing mod actions.
This directory contains library code used through Danbooru. This includes things like defining API clients, dealing with
sources, parsing tag searches, storing and resizing images, and so on.
Many of the files here use the Service Object pattern. Instead of putting complex code in models or controllers, it goes
here, in plain old Ruby objects (POROs). This keeps models and controllers simpler, and keeps domain logic isolated and
independent from the database and the HTTP request cycle.