-Changed character events to OnCharacterCreated and OnCharacterDeleted

-Finished mapping of player id to steam id in PlayerMap
-Added steam id, name, and isDead flag to factions members
-Added Name, SessionSettings, Checkpoint and Sector properties to WorldManager
-Reworked add and delete for inventory items
-Added CurrentInput to PowerReceiver
-Added PowerReceiver to FunctionalBlockEntity
-Fixed a number of bugs with New in main tool GUI
-Added dialog for adding new items to inventories