Mongoengine

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- Fixed basedict / baselist to return super(..)
- Promoted BaseDynamicField to DynamicField

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- Fixed sparse indexes on inherited docs
- Removed FileField auto deletion, needs more work maybe 0.7

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- Fixed FileField losing reference when no default set
- Removed possible race condition from FileField (grid_file)
- Added assignment to save, can now do: ``b = MyDoc(**kwargs).save()``
- Added support for pull operations on nested EmbeddedDocuments
- Added support for choices with GenericReferenceFields
- Added support for choices with GenericEmbeddedDocumentFields
- Fixed Django 1.4 sessions first save data loss
- FileField now automatically delete files on .delete()
- Fix for GenericReference to_mongo method
- Fixed connection regression
- Updated Django User document, now allows inheritance

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- Fixed indexing on '_id' or 'pk' or 'id'
- Invalid data from the DB now raises a InvalidDocumentError
- Cleaned up the Validation Error - docs and code
- Added meta ``auto_create_index`` so you can disable index creation
- Added write concern options to inserts
- Fixed typo in meta for index options
- Bug fix Read preference now passed correctly
- Added support for File like objects for GridFS
- Fix for 473 - Dereferencing abstracts

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- Django 1.4 fixed (finally)
- Added tests for Django

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- More Django updates