AI server: fixes speed/pathfinding bug with AI movement for spawns without predefined paths; resolves #24.
NPCs/monsters can now be spawned from the game server. Resolves #107.
AI server: spawned NPCs should not have any reason to wander.
Event spawns are now stored correctly, so they can be looked up (was removed accidentally with the debug).
Game server: zone flags for the updated zone are now sent when changing zones.