Django-anonymizer

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* Changed 'Anonymizer.attributes' to require every field to be listed. This is
deal with the common security problem when a model is updated, but the
Anonymizer is not updated.

Fields that should not be anonymized should specify the special value "SKIP"
as the 'replacer'.

* attributes must now be a list of tuples, not a dictionary.

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* Support for ``DecimalField``.
* Improved docs.
* Added tests

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* Changed format of attributes from a dictionary to a list of 2-tuples
(with backwards compatibility - previous format is deprecated).
* Fixed small bug with names/usernames/emails sometimes not being generated in
corresponding sets, due to fields with unique=True not being (reliably) set
before other fields.
* Added docs.

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* Changed 'varchar' field to do max_length introspection at runtime.
This breaks the previous signature of the function.
* Introduced 'replacers' module and new shortcuts.

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* Removed some debug code
* Better handling of SlugField and skipped fields in introspection

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Initial release