#41 Coop mode

[Christian Wichmann]

It should be possible to play a nonogram together with another player on an separate computer. Both should be able to mark fields and all changes are instantly seen at the other instance.

One player should start a coop session in which other players can enter. Maybe the number of players should be restricted to two!

If possible players from all over the internet should be able to play. At first it could be easier to use local network broadcast?