- fixed npcs being removed in raid mode, they are still removed if stuck in arena mode

- hotfix

- added new commands allowing you to start an assault without escalation
- zombie npcs are no longer stupid (poison zombie will throw their headcrabs and all zombies will actually attack you)
- added anti-stuck feature
- reduced poison zombie chance, increased fast zombie chance in zombie assaults

- Improved assault mode AI drastically, especially for zombies. Before they would attempt to navigate to your position which they received on spawn, meaning they would try to get there before even trying to attack you. This made them very stupid. Now they will come to you directly. This applied to combine too, but their AI didn't suffer from this issue as much since they work differently.

- Code cleanup.

- Forgot to set escalation time back to normal after testing.

- Forgot to set escalation time back to normal after testing.

- Fixed escalation increase after entering "raids_stop_assault".
- Added notification when assault is stopped via console command.

- Added compatibility with ZINV. The addon should no longer break if you have ZINV enabled.

Fixed NPC's not spawning if map just built nodes for the first time.