added metacode to the xls and csv views

app/models/map.rb

@@ -84,13 +84,14 @@ class Map < ActiveRecord::Base
 
   def to_csv(options = {})
     CSV.generate(options) do |csv|
-      csv << ["id", "name", "permission", "user.name"]
+      csv << ["id", "name", "metacode", "user.name", "permission"]
       self.topics.each do |topic|
         csv << [
           topic.id,
           topic.name,
-          topic.permission,
-          topic.user.name
+          topic.metacode.name,
+          topic.user.name,
+          topic.permission
         ]
       end
     end

app/views/maps/show.xls.erb

@@ -2,15 +2,17 @@
   <tr>
     <th>ID</th>
     <th>Name</th>
-    <th>Permission</th>
+    <th>Metacode</th>
     <th>Username</th>
+    <th>Permission</th>
   </tr>
   <% @map.topics.each do |topic| %>
   <tr>
     <td><%= topic.id %></td>
     <td><%= topic.name %></td>
-    <td><%= topic.permission %></td>
+    <td><%= topic.metacode.name %></td>
     <td><%= topic.user.name %></td>
+    <td><%= topic.permission %></td>
   </tr>
   <% end %>
 </table>