Deprecate USDZLoader.

Author: mrdoob

examples/jsm/loaders/USDZLoader.js

@@ -0,0 +1,16 @@
+import { USDLoader } from './USDLoader.js';
+
+// @deprecated, r179
+
+class USDZLoader extends USDLoader {
+
+	constructor( manager ) {
+
+		console.warn( 'USDZLoader has been deprecated. Please use USDLoader instead.' );
+		super( manager );
+
+	}
+
+}
+
+export { USDZLoader };