minor corrections

index.html

@@ -8,6 +8,6 @@
     <script src="jquery-2.1.3.min.js"></script>
     <script src="jcanvas.min.js"></script>
     <script src="exif.js"></script>
-    <script src="jp4canvas.js"></script>
+    <script src="jp4-canvas.js"></script>
   </body>
 </html>