todo list

- Unit test the C++ wrapper (in python, if possible)
- Use logging to log, among other things, decoding and type conversion errors
- Rewrite the exiv2 command-line tool and the test binaries in Python and (Python) scripts to run the same tests that are run to test exiv2
- Consider upgrading the license to GPL v3
- Integrate Robin’s work to compile and package on MacOS X
- Support Python 3
