old_contents: from pkgutil import extend_path
  __path__ = extend_path(__path__, __name__)
  
new_contents: from pkgutil import extend_path
  __path__ = extend_path(__path__, __name__)
  
  # The above addresses the issues that came up in
  # https://github.com/opencog/atomspace/issues/20
  # Basically, the various python modules are split over multiple
  # directories, including the build directories. See this:
  # http://stackoverflow.com/questions/2699287/what-is-path-useful-for
  # for an explanation.
  
subject: Add notes