Delegate used with ProgressBar is invalid

[travisvitek]

The NamasteController code pushes a ProgressBar in several locations, but the delegate that is provided is a reference to self. In this case self does not extend BehaviorDelegate and does not implement onBack, so I expect bad behavior. If you press back while the ProgressBar is visible, you will see that the application crashes with a 'Symbol Not Found Exception'.

I believe the simplest solution is to pass a reference to a delegate that handles onBack by calling System.exit() or NamasteController.onExit().