Add turret points to gates.
Gates can be garrisoned like regular wall pieces now, which looks nice.
Different civs have different amount of entities that can be placed due to differneces in their actors:
- 4: brit, gaul, maur
- 5: sele
- 6: kush, pers
- 8: athen, cart, iber, mace, spart, roman siege wall gate
- 10: ptol, rome