0.17.0

What's new

• tg messages download <chat> --all saves every file of a chat — photos, documents, videos,
  voice notes — into --output, newest first. Cut short by --timeout or Ctrl-C, it continues where
  it stopped the next time, and picks up newer messages too; where it got to is kept in a
  .download-<chat>.json beside the files. Telegram's "wait N seconds" is sat out up to five minutes,
  and --pace (1 s) spaces the pages. A file name another message already took gets the message id in
  front; nothing is overwritten. (cli-messaging 0.53.0)