Adjust feed data.

app/models/bulletin.rb

@@ -381,6 +381,7 @@ class Bulletin
     if more_url
       a['show_url'] = "#{more_url}/#{self.to_param}"
     end
+    a["org_is_top"] = self.is_top
     a["id"] = self.uid
     a["title_translations"] = self.title_translations
     a["subtitle_translations"] = self.subtitle_translations