Sokoban remake with two players through local network

xayon40-12 c597b34ef5 Import source code from old project %!s(int64=4) %!d(string=hai) anos
TwoKobanClient c597b34ef5 Import source code from old project %!s(int64=4) %!d(string=hai) anos
TwokobanServeur c597b34ef5 Import source code from old project %!s(int64=4) %!d(string=hai) anos