Objects now spawn in their spawn containers after the world is loaded from save

-Objects now spawn in their spawn containers after the world is loaded
from save
-bug where sometimes when an item is picked up, the item is not removed
from the room (after the world has been loaded from save)
-bug where items spawning in containers usually spawn twice (after the
world has been loaded from save)
-bug where items created when a player is loaded show their creation
messages in the server console twice
-cleaned up debug prints in the server console (most are now gone)
-world persistance almost working as intended.  Just need to sort out
the remaining bugs, but in general things are working as they should and
the world and everything in it can be saved and loaded!