Don't specify scheme name in 3rd party resources

src/chess.html

@@ -4,7 +4,7 @@
 		<meta http-equiv="x-ua-compatible" content="IE=edge">
 		<meta charset="utf-8">
 		<title>Chess</title>
-		<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.0/themes/base/jquery-ui.css">
+		<link rel="stylesheet" href="//code.jquery.com/ui/1.10.0/themes/base/jquery-ui.css">
 		<link rel="stylesheet" href="chess.css">
 		<link rel="shortcut icon" href="chess.ico">
 	</head>
@@ -24,10 +24,10 @@
 		</div>
 		<div id="footer"></div>
 		<div id="dim"></div>
-		<script src="http://code.jquery.com/jquery-1.9.0.min.js"></script>
-		<script src="http://code.jquery.com/ui/1.10.0/jquery-ui.min.js"></script>
-		<script src="http://cdnjs.cloudflare.com/ajax/libs/jqueryui-touch-punch/0.2.2/jquery.ui.touch-punch.min.js"></script>
-		<!--[if lt IE 9]><script src="http://cdnjs.cloudflare.com/ajax/libs/augment.js/1.0.0/augment.min.js"></script><![endif]-->
+		<script src="//code.jquery.com/jquery-1.9.0.min.js"></script>
+		<script src="//code.jquery.com/ui/1.10.0/jquery-ui.min.js"></script>
+		<script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui-touch-punch/0.2.2/jquery.ui.touch-punch.min.js"></script>
+		<!--[if lt IE 9]><script src="//cdnjs.cloudflare.com/ajax/libs/augment.js/1.0.0/augment.min.js"></script><![endif]-->
 		<script src="chess.include.js"></script>
 		<script>
 			$(makeChessGame);