Change bootstrap theme

www/index.html

@@ -6,8 +6,8 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <title>MoneroProxy</title>
     <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
-    <link href="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet">
-    <script src="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/js/bootstrap.min.js"></script>
+    <link href="//cdnjs.cloudflare.com/ajax/libs/bootswatch/3.3.7/spacelab/bootstrap.min.css" rel="stylesheet">
+    <script src="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
     <script src="//cdn.polyfill.io/v2/polyfill.min.js"></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.5/handlebars.min.js"></script>
     <script src="handlebars-intl.min.js"></script>