fix for issue #50: https://github.com/JFXtras/jfxtras-labs/issues/50

fix for issue #50

constructor in `BehaviorBase` has changed. Instead of providing a method
    
    @Override
    public List<KeyBinding> getKeyBindings()  {
        // ...
    }

key bindings are a constructor argument.

Example:

    public class SixteenSegmentBehavior extends BehaviorBase<SixteenSegment> {

      public SixteenSegmentBehavior(final SixteenSegment CONTROL) {
        super(CONTROL);
      }
    }

must be changed to

    public class SixteenSegmentBehavior extends BehaviorBase<SixteenSegment> {

      public SixteenSegmentBehavior(final SixteenSegment CONTROL) {
        super(CONTROL, new ArrayList<KeyBinding>());
      }
    }