Implement extra time

[vad]

Implement optional extra several minutes added after each half , proportional to the number and severity of injuries during the game, like in real life.

Imagine the level of adrenaline in the manager when he sees that it's not over yet :-)

[RJSlow]

I wish there was extra time as well, but games aren't delayed by injured players. According to the commentary, they get hurt and 5 seconds later are stretchered off the field (quick response trainers I assume). So in that sense there is no delays in the game, so no extra time