Fix: the items created from the loot pool are now being added to the ItemManager.

[markscho]

Creating an item in the game seems to be a 3-step process:

• item = ItemFactory.create()
• item.hydrate()
• ItemManager.add(item)
  However, that last step was left out. The other thing to note is that the corpse created is an item that is also being added to the ItemManager, but the add() method is not recursive, adding anything from the corpse's inventory. Perhaps that could be a future failsafe.

[markscho]

After further review, it looks like corpse.hydrate() would call Inventory.hydrate() which WOULD have added these items to the ItemManager. However, hydrate() was being called before these items were created. So I suppose you could reject this if you preferred calling corpse.hydrate() just prior to ItemManager.add(corpse).