add async to the staff, collection, education script tag in index.html

www/index.html

@@ -129,20 +129,20 @@
     		);})()
       </script>
   
-      <script>(function(){$( "#main-content" ).append(
+      <script async>(function(){$( "#main-content" ).append(
     			$("<span>").load("visit.html")
     		);})()
       </script>
-       <script>(function(){$( "#main-content" ).append(
+       <script async>(function(){$( "#main-content" ).append(
     			$("<span>").load("staff.html")
     		);})()
       </script>
       
-      <script>(function(){$( "#main-content" ).append(
+      <script async>(function(){$( "#main-content" ).append(
     			$("<span>").load("WSRC.html")
     		);})()
       </script>
-        <script>(function(){$( "#main-content" ).append(
+        <script async>(function(){$( "#main-content" ).append(
     			$("<span>").load("education.html")
     		);})()
       </script>