0.22.0

• Slash commands on Discord. Every command is also a slash command -
  /register, /login, /whoami, /fight, /achievements, /align with
  its choices, /prestige, /perk, and /admin for admins - answered so
  only you see it. A slash command's options reach only the bot, so a
  password no longer needs a DM.
• A Play button on the pinned note opens a form to make a character, and
  I play on IRC one to log in as yours; a player who has one is seated at
  once. The buttons keep working across restarts.
• /whoami is a card: level, next level, alignment, items, prestige,
  achievements and keepsakes at a glance.
• The level charts go back to the beginning. Level-ups have been
  announced since the first day, and the old ones are read back out of the
  event log and linked to their characters, once, at startup - so a chart
  shows the whole climb rather than starting at 0.21.0.
• Operators: slash commands need the bot invited with the
  applications.commands scope. Without it they are skipped with a warning,
  and the ! commands work as before.