UnsummonW Implementation + Tweaks

* UnsummonW can be used to remove the mob from existence.
* Mob groups now aggro together.
* Mobs space a little bit when chasing the player.
* Combat balance tweaked a bit, you can take out an entire boss group of scoria cephalopod with good nano usage with common tier weapons.

src/MobManager.hpp

@@ -163,4 +163,6 @@ namespace MobManager {
     /// returns bullet id
     int8_t addBullet(Player* plr, bool isGrenade);
 
+    void followToCombat(Mob *mob);
+
 }