------
* Fixed a bug when multiple tables inherit from the same mixin (thanks to
brnosouza).
* Added a ``log_queries`` option to ``PostgresEngine``, which is useful during
debugging.
* Added the `inflection` library for converting ``Table`` class names to
database table names. Previously, a class called ``TableA`` would wrongly
have a table called ``table`` instead of ``table_a``.
* Fixed a bug with ``SerialisedBuiltin.__hash__`` not returning a number,
which could break migrations (thanks to sinisaos).
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