make the ajax loader appear in a box

public/javascripts/application.js

@@ -20,9 +20,10 @@ $(document).ready(function() {
   });
 
   $(window).unbind('.infscr');
-  $('#main_stream + .pagination').hide();
   
   $("a.paginate").live("click", function() {
+    $(this).css("display", "none");
+    
     $(document).trigger("retrieve.infscr");
   });
 });

public/stylesheets/sass/application.sass

@@ -626,7 +626,7 @@ ul.show_comments
       :margin
         :bottom 2em
 
-a.paginate
+a.paginate, #infscr-loading
   :border
     :width 1px
     :style solid