add async again

Former-commit-id: 09451f9f
Former-commit-id: b7a6648f588b6df447a96a60fbaeb0f04ba8385f [formerly ce20fe5340cc1b3f7a3e51c85bf9d637435cd84b]
Former-commit-id: 50a30db44d2401748e6fbb91c0a0b3b05b5d30c2

www/index.html

@@ -123,7 +123,7 @@
              - remember to use a unique id, 
              - (optional) set a "data-custom-background-img" attribute with a link to custom background image which will be used when the viewer scrolls to this section -->
    
-      <script>(function(){$( "#main-content" ).append(
+      <script async>(function(){$( "#main-content" ).append(
     			$("<span>").load("intro.html")
     		
     		);})()
@@ -133,12 +133,12 @@
     			$("<span>").load("visit.html")
     		);})()
       </script>
-       <script>(function(){$( "#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>