- Remove the duplicate swig interface files from the `python` directory.
- Remove the rule specifying those files from `MANIFEST.in`.
- Modify `setup.py` to pull in the interface files from the parent directory when preparing the distrubution using `sdist`.
- Add the rule `exclude openbabel.py` to `MANIFEST.in`, to help prevent accidentally including a copy of the resulting swig bindings in the source distribution.
- Bump the python bindings version number to 1.8.2 to allow these changes to be pushed to PyPI.