Update demo.html

demo.html

@@ -7,17 +7,17 @@
 
 		<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1, maximum-scale=1">
 
-                <link href="https://cdn.rawgit.com/ivis-at-bilkent/cytoscape.js-context-menus/master/cytoscape-context-menus.css" rel="stylesheet" type="text/css" />
-                
-                <script src="https://code.jquery.com/jquery-3.0.0.js"></script>
+                <link href="https://unpkg.com/cytoscape-context-menus/cytoscape-context-menus.css" rel="stylesheet" type="text/css" />
+		
+		<script src="https://code.jquery.com/jquery-3.0.0.js"></script>
 		<script src="https://unpkg.com/cytoscape/dist/cytoscape.min.js"></script>
 
 		<!-- for testing with local version of cytoscape.js -->
 		<!--<script src="../cytoscape.js/build/cytoscape.js"></script>-->
 
-                <script src="https://cdn.rawgit.com/ivis-at-bilkent/cytoscape.js-context-menus/master/cytoscape-context-menus.js"></script>
-		<script src="https://cdn.rawgit.com/ivis-at-bilkent/cytoscape.js-undo-redo/unstable/cytoscape-undo-redo.js"></script>
-                <script src="cytoscape-edge-editing.js"></script>
+		<script src="https://unpkg.com/cytoscape-context-menus/cytoscape-context-menus.js"></script>
+		<script src="https://unpkg.com/cytoscape-undo-redo/cytoscape-undo-redo.js"></script>
+		<script src="cytoscape-edge-editing.js"></script>
 
 		<style>
 			body {