Save the FileSaver library

snap.html

@@ -18,6 +18,7 @@
 		<script type="text/javascript" src="locale.js"></script>
 		<script type="text/javascript" src="cloud.js"></script>
 		<script type="text/javascript" src="sha512.js"></script>
+		<script type="text/javascript" src="FileSaver.min.js"></script>
 		<script type="text/javascript">
 			var world;
 			window.onload = function () {