'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.'

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()
