Merged src directory with existing koans.

koans/path_to_enlightenment.rb

@@ -17,6 +17,7 @@ require 'about_blocks'
 require 'about_sandwich_code'
 require 'about_scoring_project'
 require 'about_classes'
+require 'about_open_classes'
 require 'about_dice_project'
 require 'about_inheritance'
 require 'about_modules'