This script receives notifications from the DeviceOrientationDetector when the size of the screen changes. It doesn't do a whole lot besides expose an event that passes the new size to other listener scripts.
Currently, the following scripts use DeviceOrientationListener listen for the event sent by this script:
The event exposed by this class has the following function signature:
public delegate void OrientationChangedCallback (int screenWidth, int screenHeight);
event OrientationChangedCallback OnOrientationChanged
This is called when the screen size is updated. The new size is passed in.