Variable damage to/from mobs

* Player weapons and armor ratings are taken into account when damaging/getting damaged by mobs.
* Players have a 5% chance to critical strike mobs, this doubles the player's weapon power.
* Aside from player and mob stat based damage variance, there is also an inherent 20% variance to any damage.

src/PlayerManager.cpp

@@ -316,6 +316,9 @@ void PlayerManager::enterPlayer(CNSocket* sock, CNPacketData* data) {
     addPlayer(sock, plr);
     //check if there is an expiring vehicle
     ItemManager::checkItemExpire(sock, getPlayer(sock));
+    
+    //set player equip stats
+    ItemManager::setItemStats(getPlayer(sock));
 }
 
 void PlayerManager::sendToViewable(CNSocket* sock, void* buf, uint32_t type, size_t size) {