Use "std::unordered_map" instead of "std::vector" in order to reduce memory usage (not much, perhaps 5-10%)
identify missing pool entries in pool_template via error messages in the server log
Concerning the pool entries I applied the following fixes as they would now cause errors:
Remove pool entry 5217 from pool_gameobject (only 1 game object "Saronite", not needed here)
Remove pool entry 1047 from pool_creature (only 1 creature "Hematos", not needed here)
Add a few missing Saronite nodes to pool_template
