GameState

Used to get/set the current state of the game.
 * public static const LOADING : uint = 0;
 * public static const MENU_MAIN : uint = 1;
 * public static const OPTIONS : uint = 2;
 * public static const PLAYING : uint = 3;
 * public static const PAUSED : uint = 4;
 * public static const MENU_INGAME : uint = 5;
 * public static const EDITOR : uint = 6;