clean.rake in nanoc-4.0.0a1

- old
+ new

@@ -1,10 +1,10 @@
 # encoding: utf-8
 
 desc 'Remove output files generated by nanoc'
 task :clean do
   # Load site
-  site = Nanoc::Site.new('.')
+  site = Nanoc::Int::Site.new('.')
   if site.nil?
     $stderr.puts 'The current working directory does not seem to be a ' \
                  'valid/complete nanoc site directory; aborting.'
     exit 1
   end