Include three-ik.js

Author: Avaer Kazmer

app.html

@@ -16,7 +16,8 @@
     <script src="cubicBezier.js"></script>
     <!-- <script src="sprite3d.js"></script> -->
     <script src="land.js"></script>
-    <script src="skin.js"></script>
+    <!-- <script src="skin.js"></script> -->
+    <script src="three-ik.js"></script>
     <script src="parse5.js"></script>
     <script src="html-beautify.js"></script>
     <script src="file-type.js"></script>