• #651: Double-encoded path in the browser plugin. Should fix a few broken
  links in some setups.
• #650: Correctly cleaning up change info after deleting calendars (@Errorname).
• #658: Updating schedule-calendar-default-URL does not work well, so we're
  disabling it until there's a better fix.
• The zip release ships with sabre/vobject 3.4.3,
  sabre/http 3.0.5, and sabre/event 2.0.2.