Changelog
---------

Version 0.1
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First public preview release.

Version 0.1.1
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Fixed MongoDB backend InvalidDocument Error.

Version 0.2
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- Added `SqlAlchemySessionInterface`.
- Added support for cookie session id signing.
- Various bugfixes.

Version 0.2.1
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Fixed signing failure.

Version 0.2.2
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Added support for non-permanent session.
