save current sellers to a file

[kounelios13]

It would be nice to be able to detect when then server closes and then store current sellers with their scores in a file

[jak78]

Hi. I have an implementation, you will get a PR soon

[jak78]

Hi,
I think I didn't understand. Do you wish to export the scores in a file at the end of the game? Or do you want the server to be able to keep the teams & scores after restart? My PR will implement the latter