Prevent GUI from rendering before it's ready (fixes #127)

gui/index.html

@@ -84,10 +84,14 @@
       text-align: right;
       display: inline-block;
     }
+
+    .ng-cloak {
+      display: none !important;
+    }
   </style>
 </head>
 
-<body ng-controller="SyncthingCtrl">
+<body ng-controller="SyncthingCtrl" class="ng-cloak">
 
   <!-- Top bar -->