Add method to list orphaned pluralizations

Add method to thor locales to list locales that
have a pluralization file but no locale file
See svenfuchs#1011

locales.thor

@@ -103,6 +103,12 @@ class Locales < Thor
  puts self.incomplete_locales.count
  end
 
+ desc 'orphaned_pluralizations', 'Returns pluralizations that do nothave a locale file'
+ def orphaned_pluralizations
+ orphans = self.list_pluralizations.difference(self.list_locales)
+ puts orphans.join(', ')
+ end
+
  private
 
  desc 'list_locales', 'List all locales'
@@ -114,6 +120,16 @@ class Locales < Thor
  return locales.sort
  end
 
+ desc 'list_pluralizations', 'List all pluralizations'
+ def list_pluralizations
+ path_to_pluralizations = 'rails/pluralization'
+ Dir.chdir(path_to_pluralizations)
+ pluralization_files = Dir.glob('*.rb')
+ pluralizations = pluralization_files.map{ |f| File.basename(f, '.rb') }
+ Dir.chdir('../..') # rewind
+ return pluralizations.sort
+ end
+
  desc 'complete_locales', 'List complete locales'
  def complete_locales
  locales = []