0.68.0

Fixed

• Tasks and reminders work in a store that holds only notes. A notes folder is an account: --account and
  --source take it as notes:<number> (the folder_id search gives) or as the folder:<id> Memo's own errors
  show, and --source notes names your folder when you have one. Every spelling was refused before, so a task
  could not be made from a note and a reminder needed a mail account. memo tasks add document:<id> takes the
  file's folder as its account without --account.
• memo tasks list and memo reminders list without --source read every stored account and name them in
  meta.accounts, as a search does; they refused before. memo tasks agenda still reads one account; the README
  said it covered every account.
• A reminder for a task in a project is refused with the reason: such a task belongs to no account. The message
  said the task was not open. A read given --account provider:account is told to use --source with that value.