Create api changeset download resource

app/views/api/changesets/downloads/show.xml.builder

@@ -3,17 +3,17 @@ xml.instruct! :xml, :version => "1.0"
 xml.osmChange(OSM::API.new.xml_root_attributes) do |osm|
   @created.each do |elt|
     osm.create do |create|
-      create << render(elt)
+      create << render(:partial => "api/#{elt.to_partial_path}", :object => elt)
     end
   end
   @modified.each do |elt|
     osm.modify do |modify|
-      modify << render(elt)
+      modify << render(:partial => "api/#{elt.to_partial_path}", :object => elt)
     end
   end
   @deleted.each do |elt|
     osm.delete do |delete|
-      delete << render(elt)
+      delete << render(:partial => "api/#{elt.to_partial_path}", :object => elt)
     end
   end
 end