Geonode-avatar

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* Update pillow version as in geonode

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* Typo on avatar admin

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* Python3 syntax updates: remove unicode
* Syntax updates for Python 3

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* Added Django 2.1, 2.2, and 3.0 support.
* Added Python 3.7 and 3.8 support.
* Removed Python 1.9 and 1.10 support.
* Fixed bug where avatars couldn't be deleted if file was already deleted.

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* Added Django 2.0 support.
* Added ``avatar_deleted`` signal.
* Ensure thumbnails are the correct orientation.

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* **Backwards incompatible:** Added ``AVATAR_PROVIDERS`` setting. Avatar providers are classes that return an avatar URL for a given user.
* Added ``verbose_name`` to ``Avatar`` model fields.
* Added the ability to override the ``alt`` attribute using the ``avatar`` template tag.
* Added Italian translations.
* Improved German translations.
* Fixed bug where ``rebuild_avatars`` would fail on Django 1.10+.
* Added Django 1.11 support.
* Added Python 3.6 support.
* Removed Django 1.7 and 1.8 support.
* Removed Python 3.3 support.