Brings the Olson tz database into Python. This library allows accurate and
cross platform timezone calculations.
More information in src/README.txt
Release process;
1) Untar upstream tarballs into elsie/src
2) Update OLSON_VERSION in src/pytz/__init__.py and EXPECTED_VERSION in
src/pytz/tests/test_tzinfo.py
3) make test
4) make dist