Allow for different formats to the getBugs call

This is a rudimentary initial version of a GPX and a rss
format for looking at bugs in an area.

app/views/map_bugs/get_bugs.rss.builder

@@ -0,0 +1,33 @@
+xml.instruct!
+
+xml.rss("version" => "2.0", 
+        "xmlns:geo" => "http://www.w3.org/2003/01/geo/wgs84_pos#",
+        "xmlns:georss" => "http://www.georss.org/georss") do
+  xml.channel do
+    xml.title "OpenStreetBugs"
+    xml.description "A list of bugs, reported, commented on or closed in your area"
+    xml.link url_for(:controller => "site", :action => "index", :only_path => false)
+
+	for bug in @bugs
+      xml.item do
+		if bug.status == "closed"
+			xml.title "Closed bug"	
+		else if bug.map_bug_comment.length > 1
+			xml.title "Commented on bug"
+		else
+			xml.title "Created bug"
+		end	end
+        
+        xml.link url_for(:controller => "site", :action => "index", :only_path => false)
+        xml.description  bug.flatten_comment("|")
+		if (!bug.map_bug_comment.empty?)
+	        xml.author bug.map_bug_comment[-1].commenter_name
+		end
+        xml.pubDate bug.last_changed.to_s(:rfc822)
+          xml.geo :lat, bug.lat
+          xml.geo :long, bug.lon
+          xml.georss :point, "#{bug.lat} #{bug.lon}"
+      end
+	end
+  end
+end