This commit reverts db7ef3f025
(though it keeps the year updates)
After discussion with several people, it seems better to mention
copyright owners explicitly. eg. https://reuse.software/faq/#vcs-copyright
explains the issue of using VCSs to track copyright.
As db7ef3f025 only replaced mentions
of my name with 'The Limnoria Contributors', this commit only needs
to undo that + add one person who contributed to setup.py.
This involved also updating src/conf.py to look for sqlite3 and add it to supybot.conf.databases list,
since karma uses the plugins.DB() constructor for its database, which checks the available databases list.
