Added check for unsaved changes to the Stats Editor when exiting to the Game Manager or closing the application
Added "Stats" item to the Game Explorer for quick access to the Stats Editor
Added "initiator" as an option to the Entity Expression Builder dialog
Added ability to assign/remove an entity's ID using assignment statements (e.g. self.id = "new_id" to assign or self.id = "" to remove)
Updated Stats Editor tab to be marked as having changes when appropriate
Updated sound effect for enemy death in the bundled demo game
Fixed issue with map pre-load scripts no longer working properly (causing the game to hang during the map load)
Fixed issue where Stats Editor was not being properly cleared out when exiting to the Game Manager
Fixed issue where reference to an entity's ID (e.g. self.id) was not able to be used in conditional expressions or right-hand side of assignment statements