Djangotoolbox

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* Added support for Django 1.4

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* Moved all code required for value conversion for / deconversion from
database to ``DatabaseOperations``
* Moved nonrel fields' values handling to toolbox, allowing backends to
just select an appropriate storage type (including string and binary)
* Moved decimal-to-string implementation preserving comparisons to
toolbox (previously in the GAE backend)
* Let backends use the QuerySet's ``standard_ordering`` when no field
ordering is defined
* Fixed conversion of values for ``EmbeddedModelField`` subfields
* Fixed preparation of lookup arguments for ``List/Set/DictField``
* Fixed value comparisons in in-memory filtering (only used by GAE)
* Fixed ``update`` for ``EmbeddedModelField`` nested in a nonrel field

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* Added lazy model lookups to EmbeddedModelField
* Simplified CapturingTestSuiteRunner by using Django's integrated unittest2 package
* Several new unit tests

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* Added default implementation for ``check_aggregate_support()``. Contributed by Jonas Haag
* Added ``ListField``/etc. support for fields that require ``SubfieldBase``

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This release unifies the field types of all existing nonrel backends.

* Merged with ``ListField`` from MongoDB backend. Contributed by Jonas Haag
* Added ``SetField``, ``DictField``, and ``RawField``. Contributed by Jonas Haag
* Fixed support for proxy models. Contributed by Vladimir Mihailenco
* Several cleanups and minor bug fixes