Scene.copy(): recursive support

src/scenes/Scene.js

@@ -18,9 +18,9 @@ THREE.Scene = function () {
 THREE.Scene.prototype = Object.create( THREE.Object3D.prototype );
 THREE.Scene.prototype.constructor = THREE.Scene;
 
-THREE.Scene.prototype.copy = function ( source ) {
+THREE.Scene.prototype.copy = function ( source, recursive ) {
 
-	THREE.Object3D.prototype.copy.call( this, source );
+	THREE.Object3D.prototype.copy.call( this, source, recursive );
 
 	if ( source.fog !== null ) this.fog = source.fog.clone();
 	if ( source.overrideMaterial !== null ) this.overrideMaterial = source.overrideMaterial.clone();