first version of RSS builder

app/views/search/index.rss.builder

@@ -0,0 +1,18 @@
+xml.instruct! :xml, :version => "1.0"
+xml.rss :version => "2.0" do
+  xml.channel do
+    xml.title "Search results"
+    xml.description "Papers matching search criteria"
+    xml.link root_url
+
+    @papers.each do |doc|
+      xml.item do
+        xml.title doc.name
+        xml.description article.content[0, doc.content.length < 30 ? doc.content.length : 30]
+        xml.pubDate doc.published_at.to_date.to_s(:rfc822)
+        xml.link doc.url
+        xml.guid doc.url
+      end
+    end
+  end
+end