xml-sitemap.rb in xml-sitemap-1.2.0

- old
+ new

@@ -1,10 +1,16 @@
 require 'time'
 require 'date'
 require 'zlib'
 require 'builder'
+begin
+  require 'nokogiri'
+rescue LoadError
+end
 
 require 'xml-sitemap/options'
+require 'xml-sitemap/render_engine'
+require 'xml-sitemap/item'
 require 'xml-sitemap/map'
 require 'xml-sitemap/index'
 
 module XmlSitemap
   class << self