add RSS category、content

app/views/announcement_feeds/rssfeed.rss.builder

@@ -1,5 +1,5 @@
 xml.instruct! :xml, :version => "1.0" 
-xml.rss :version => "2.0" do
+xml.rss :version => "2.0", "xmlns:content" => "http://purl.org/rss/1.0/modules/content/" do
   xml.channel do
     xml.title @bf.title
     xml.link "/xhr/announcements/rssfeed/#{@bf.uid}.rss"
@@ -10,6 +10,8 @@ xml.rss :version => "2.0" do
         xml.description announcement.subtitle
         xml.pubDate announcement.created_at.to_s(:rfc822)
         xml.link page_for_bulletin(announcement)
+        xml.category announcement.category.title
+        xml.content(:encoded, announcement.text)
       end
     end
   end