Prevent NullPointer & useless call if their is no linked button to a
TollSign
Toll sign can now be purchased several time by adding "for each" on
third line
Added max player
Added starting money & starting points
Added Join & Leave signs
Improved join sign
Added Kick If Zero Point, works like a life counter
Clean up the code + store player health, xp, food level
Remove XP orb at game end