Revanche & ranking

You can choose to play revanches with the same players now. The Players
remind their further ranks.
Next steps are to show the Players ranks and a mode 3 to play a hundred
games for comparison of strategies.
medal table & mode 3

… were both added and work properly. The programm now has even a sence,
since you can play 100 games in a second and compare strategies.
Müll

nothing good
Revert "Müll"

This reverts commit 45fee5577e3123579567fe11c2ad505721630bb6.