Treasure Generator

Still working on the massive inventory system. There are a lot of small details to deal with! The treasure chest is working great now. Reward items can be spawned when an avatar opens it. The treasure generator allows you to specify individual probabilities for each each item. Or, certain items can always be returned if needed. People can also leave things in a chest for other players to find. Items that were left in the chest will expire and go away eventually, unless in a private chest. There is also a wait time before new treasure will be generated for each avatar. If the chest is a public chest, then there is a time limit on how long a player can keep it open.