Factory-boy

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*New:*

- Add ``factory.CircularSubFactory`` to solve circular dependencies between factories

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*Bug fix:*

- Fix ``factory.PostGenerationDeclaration`` and derived classes.

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*New:*

- Add :meth:`~factory.use_strategy` decorator to override a
:class:`~factory.Factory`'s default strategy
- Improve test running (tox, python2.6/2.7)
- Introduce :class:`~factory.PostGeneration` and
:class:`~factory.RelatedFactory`

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*Bug fix:*

- Fix packaging rules

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*New:*

- Add :class:`~factory.Iterator` and ``factory.InfiniteIterator`` for :class:`~factory.Factory` attribute declarations.
- Provide :func:`~factory.Factory.generate` and :func:`~factory.Factory.simple_generate`, that allow specifying the instantiation strategy directly.
Also provides :func:`~factory.Factory.generate_batch` and :func:`~factory.Factory.simple_generate_batch`.

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*New:*

- Add :func:`~factory.Factory.build_batch`, :func:`~factory.Factory.create_batch` and :func:`~factory.Factory.stub_batch`, to instantiate factories in batch