changes

Basic Turret changes:

- Third upgrade damage per shot: 8 >>5

- Third upgrade cost: 1550 >> 1350

- Final upgrade damage per shot: 25 >> 12 (it was more dps than gunner)

- Final upgrade cost: 5600 >> 5000

Combomatic Turret changes:

- The combomatic turret will display the current damage of the bullet (0 if it hasnt shot)

- Final upgrade incrementing damage per shot: 15 >> 12

Bug Fixes/other changes

- Exterminator properly works between games

- You can no longer sell an obstacle if there is a turret on top.

- The exit/end of the map will now be position based, not collider based. The colliders caused big enemies to appear to exit too early, so now it works by position.

- Turrets are now rotation constrained.