• Add support for replying to a toot (#6)
• Add toot delete command for deleting a toot (#54)
• Add global --quiet flag to silence output (#46)
• Make toot login provide browser login, and toot login_cli log in via
  console. This makes it clear what's the preferred option.
• Use Idempotency-Key header to prevent multiple toots being posted if request
  is retried
• Fix a bug where all media would be marked as sensitive