Infection rewrite

[teoman002]

This is the solution I was talking about in #126

• played 3 rounds without errors
• 1 spectator, 3 humans, every human is infected once

[teoman002]

I played several rounds:

• where humans/zombies won
• 1 spectator, 2 players playing
• 2 players playing
• 3 players playing

I merge it, because all bugs are from this point are not obvious.

[teoman002]

this merged also merged and closed #138