code: def add_defaults(self):
          
          self._add_defaults_standards()
          self._add_defaults_optional()
          self._add_defaults_python()
          self._add_defaults_data_files()
          self._add_defaults_ext()
          self._add_defaults_c_libs()
          self._add_defaults_scripts()
docs: Add all the default files to self.filelist:
            - README or README.txt
            - setup.py
            - test/test*.py
            - all pure Python modules mentioned in setup script
            - all files pointed by package_data (build_py)
            - all files defined in data_files.
            - all files defined as scripts.
            - all C sources listed as part of extensions or C libraries
              in the setup script (doesn't catch C headers!)
          Warns if (README or README.txt) or setup.py are missing; everything
          else is optional.