Add relation version pages

app/controllers/old_relations_controller.rb

@@ -0,0 +1,19 @@
+class OldRelationsController < ApplicationController
+  layout :map_layout
+
+  before_action :authorize_web
+  before_action :set_locale
+  before_action -> { check_database_readable(:need_api => true) }
+  before_action :require_oauth
+
+  authorize_resource
+
+  around_action :web_timeout
+
+  def show
+    @type = "relation"
+    @feature = OldRelation.preload(:old_tags, :changeset => [:changeset_tags, :user], :old_members => :member).find([params[:id], params[:version]])
+  rescue ActiveRecord::RecordNotFound
+    render :action => "not_found", :status => :not_found
+  end
+end