New specialization: Coach!
This is the first specialization that affects the stats of the rest of the team allowing to experiment with more varied strategies. Multiple 'Coach' specialization on the same team don't stack.
Balance fixes:
- Specialization changes are allowed only in between points. Changing specialization during game will delay it until the current point is finished.
- Added a hidden player stat called 'rage'. This parameter starts to gradually increases the longer disc hangs in the air. The defence will get up to 20% speed boost if disc hangs over 2.5 seconds. On offence, the receiver will get a slight debuff with increased rage: decreased speed, slower speed boost during layouts and decreased catch radius during layouts.
Gameplay fixes:
- Fixed a problem resulting in some accidental specialization reset if other players joins
- Removed snow and Christmas tree