new file:   app/demo/g4.html
	modified:   app/demo/graph.html
	modified:   jsvm/jsre-ui.js
	modified:   jsvm/jsre.js
	modified:   jsvm/lib/jsre-ui.js
	modified:   jsvm/src/js/awt/CanvasGroup.js
	modified:   jsvm/src/js/awt/CanvasLayer.js