Zip-compress .amf file

examples/webgl_loader_amf.html

@@ -50,6 +50,8 @@
 		<script src="js/Detector.js"></script>
 		<script src="js/controls/OrbitControls.js"></script>
 
+		<script src="js/libs/jszip.min.js"></script>
+
 		<script>
 
 			if ( ! Detector.webgl ) Detector.addGetWebGLMessage();