more gamepad changes

- now have a menu bar to access settings
- now handle user input to assign mappings
- fixed some typos
- now properly shutdown controller threads on exit
- renamed GamepadSettings to GamepadMapping
- created a lock to ensure we do not add/remove gamepads from the list while we are handling their events
- fixed settings directory booch

src/com/limelight/settings/SettingsManager.java

@@ -16,8 +16,8 @@ public class SettingsManager {
 	private static SettingsManager manager;
 	
 	private SettingsManager() {
-		settingsFile = new File(SETTINGS_DIR + "settings");
-		gamepadFile = new File(SETTINGS_DIR + "gamepad");
+		settingsFile = new File(SETTINGS_DIR + File.separator + "settings.lime");
+		gamepadFile = new File(SETTINGS_DIR + File.separator + "gamepad.lime");
 		settingsDir = new File(SETTINGS_DIR);
 	}