Zombie Fortress Battlefield ZFB_200408

A lot of changes.
1. Autoreload machine gun, bazooka, bomber's silo when the clip is empty, currently there is a bug where it reloads 2 times, not sure why its doing this will look into it further, or i will just leave it like that having an extra ammo if you wait enough.
2. Bringing the hardcore element:
3. Zombie Boss HP quadripled.
4. Zombie Boss spawns each 4 days.
5.On day 4 and 8, 1x Zombie Boss (ZB) spawns.
On day 12, 16, 20, 2x ZBs spawn.
After day 20...24..28.., 3x ZBs spawn.
32...36...40.., 4x
44...48...5x
50+...6x
6.Increase all zombies find player range, meaning they will lock on you from the other end of the map.
7. Changed the zombie portal script a bit where there is a limit on how many zombies it can spawn thus giving a chance for zombies to spawn on the sides of the map at night. (there is hyperspawn rate on the zombie portal, where it spawns creeps very quickly maybe its intentional when the portal is on low health)
8. More, a lot more gregs. To lift zombies from the pit and release them above your heads.
9. More wraiths.
10. Added collision to the Zombie Portals so now missiles and bombers heavy bombs should be able to hit, thus would be easier to destroy so I increase the HP of the Zombie Portal by 3x times.
11. Fixed the nursery, builders workshop and knights workshop icons.