- Update to 4.2:
* Use setuptools.
* Set zip_safe to False.
* Remove reference to DurusWorks.
* Use python3 for scripts.
* Small optimization for setting _p_* attributes.
* Pickler.clear_memo() can get slow. Work-around that issue.
* When finishing FileStorage commit, log file size.
* Order pack todo queue by file offset.
* Add support for an inherited server socket.
* Improve db_to_py3k.py script.
* Move scripts to 'bin' directory.
* Define separate methods for PersistentSet.
* Add --storage-class option to 'durus' command line tool.
* Fix suble bug in FileStorage2 packer.
* Add create_from_records() method.
* Restore DFS20 file storage format.
- Remove nose from BuildRequires.