Django-modelcluster

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* Fix: Updated add_ignored_fields declaration so that South / Django 1.6 correctly ignores modelcluster.contrib.taggit.ClusterTaggableManager again

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* Django 1.8 compatibility
* 'modelcluster.tags' module has been moved to 'modelcluster.contrib.taggit'

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(withdrawn due to packaging issues)

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* ClusterForm.Meta formsets can now be specified as a dict to allow extra properties to be set on the underlying form.
* Added order_by() method to FakeQuerySet
* Fix: Child object ordering is now applied without needing to save to the database

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* Django 1.7 compatibility
* Fix: Datetimes are converted to UTC on serialisation and to local time on deserialisation, to match Django's behaviour when accessing the database
* Fix: ParentalKey relations to a model's superclass are now picked up correctly by that model
* Fix: Custom Media classes on ClusterForm now behave correctly

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* Added exists(), first() and last() methods on FakeQuerySet
* Fix: Model ordering is applied when adding items to DeferringRelatedManager