fix for Issue 654: Relocate "Incomplete" directory.
Rename property to better indicate it represents the card name.
Ensure that getTransformCardDefinition() does not return null.
clicking on a double-faced card in CardViewer will show reverse side.
Clicking on a flip card in CardViewer will display the flipped image.
Rename flip property to better indicate it represents the card name.
improve mouseclick response.