v0.11.1

Netplay fixes. The game itself is patched exactly as 0.11.0 patched it, so
there is no need to re-patch - but both players should update the Internet
play add-on, which is the same Install button.

Fixed

• Mismatched patches left the joining player waiting. When two players
  had different gameplay patches the host was told why and the other player
  was not - they sat on "Connecting..." until they gave up. Both sides now
  get the message. Updating one side is enough for that side to see it.
• A match could freeze while a menu was open. If a frame went missing
  between rounds it was never asked for again, and the match hung until
  someone quit.
• A dropped connection while hosting killed the dialog. Your code lasts
  as long as you keep the window open, but if the machine sleeps or the
  network drops for half a minute the server forgets it. That used to end
  the wait with "No answer from the matchcode server". It now takes a fresh
  code and carries on - the dead one disappears rather than sitting there
  looking valid.
• "No game with that code" also appeared when the code was fine and
  somebody else had already joined it. It says so now.
• The patcher could leave the ending credits half-written if the disk filled
  up mid-apply, and a second run would report the line as already in place.
  Both roll files are now written together or not at all.

Playing against someone still on 0.11.0 works as before.