* Move the Curated pool updater from Reportbooru to Danbooru.
* Change the process for selecting curated posts. Previously it was
every post from the last week with at least three supervotes. This was
flawed because it included both super-upvotes and super-downvotes. Now
it's the top 100 posts from the last week, ordered from most super-upvoted
to least.
* Pick the largest character or copyright tags by post count. Previously
we picked the tags with the longest names, which was nonsensical.
* Remove tag cateogory logic from config file. We can't avoid hardcoding
some knowledge about tag categories here, so there's no point in trying.
This affects tab titles on post show pages as well as filenames in
downloaded images.
Stop maintaining pool category pseudo tags (pool:series, pool:collection)
in pool strings. They're no longer used and the changes to the
`Post#pools` method in dc4d2e54b caused issues with this.
Also allow Members to change the category of large pools again. This was
only restricted because maintaining these pseudotags forced us to update
every post in the pool whenever a pool's category was changed.
Drop support for https://danbooru.donmai.us/cache/tags.json. This was a
nightly dump of the tags table that was originally added in #1012. It
was never documented and never really used except for by the DanbooruUp
extension.
* Perform backups synchronously inside `distribute_files` instead of
asynchronously in `queue_backup`. Asynchronous backups assumed that
files are stored on the local filesystem, which isn't true in general.
* Remove obsolete backup service classes.
Create the DanbooruBot account in db/seeds.rb instead of in an
initializer. Move the old db/seeds.rb to db/populate.rb.
Fixes a bug introduced in e2eb45a. Creating DanbooruBot in an
initializer was wrong because in a fresh install the users table doesn't
exist yet. This caused `rake db:migrate` to fail.
