[ANN] RelStorage 2.0 Released

On behalf of the RelStorage contributors, I am pleased to announce the release of RelStorage 2.0.

This major release of RelStorage brings full support for Python 3, ZODB/ZEO 4 and 5, PyPy and gevent. 

This release also *removes* support for Python 2.6 and ZODB3. RelStorage 1.6.3 (2016-09-30) is the most recent release supporting these legacy platforms.

Other highlights include:

- Expanded and reorganized documentation hosted at http://relstorage.readthedocs.io/
- Improved caching efficiency.
- Support persistent cache files, and cache tracing, similar to ZEO.
- Improved conflict resolution efficiency.
- Remove ``poll-interval`` because it does more harm than good.
- RelStorage is now distributed as binary wheels in addition to source because of the use of a C extension to speed up caching. For installation instructions please see http://relstorage.readthedocs.io/en/latest/install.html

The complete list of changes is too extensive to list here. For full details, please see http://relstorage.readthedocs.io/en/latest/changelog.html

Although RelStorage's internals have been substantially changed, most users just relying on documented ZODB behaviour should find RelStorage 2.0 to be a drop-in replacement for 1.6 on supported platforms. Notably, there are no schema changes. Beta releases from 2.0b1 on have been continuously used in some production sites since June.

Please report issues to https://github.com/zodb/relstorage/issues

Thanks,
Jason

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