Added cache busting

Author: jzongker

index.html

@@ -12,7 +12,7 @@
       href="https://fonts.googleapis.com/css?family=Roboto"
       rel="stylesheet"
     />
-    <link rel="stylesheet" href="/css/all.css" />
+    <link rel="stylesheet" href="/css/all.css?v=1" />
     <link rel="stylesheet" href="/apphelper/css/styles.css"  />
     <link
       rel="stylesheet"