percheron.rb in percheron-0.7.12

- old
+ new

@@ -4,9 +4,10 @@
 require 'docker'
 require 'naught'
 require 'semantic'
 require 'metastore'
 require 'liquid'
+require 'singleton'
 
 require 'percheron/oh_dear'
 require 'percheron/core_extensions'
 require 'percheron/version'
 require 'percheron/logger'