Easy-thumbnails

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* New minimum requirement of Django 1.4 or 1.7+.

* Fix EXIF orientation to use transpose.

* Upgrades to avoid deprecation warnings.

* Fix app settings not working in Django 1.11.

* Fix a bad conditional check causing incorrect behaviour in autocropping
transparent images.

* Django 1.8+ compatibility for ``thumbnail_cleanup`` command.

* Add ``easy_thumbnails_tags`` template tag mirror to allow multiple
thumbnailer libraries to coexist happily.

* Limit pillow to its final compatible version when on Python 2.6

* Fix tests.

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* New ``Alias`` namer.

* Avoid a potential concurrency issue with creating the cache.

* Fix incorrect use of select_related for source thumbnail model.

* Removed some vestigal processor arguments.

* Allow ``HIGH_RESOLUTION`` argument on thumbnail template tag.

* Add logic to correctly handle thumbnail images on deferred models (e.g. when
using ``.only()``).

* Add a ``data_uri`` filter to allow rendering of an image inline as a data
uri.

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* Fixed: Option ``zoom`` can also be used by itself, without combining it with
``crop``.

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* Fix migrations for Django 1.7 final.

* Fix contain bad image EXIFs being able to still raise an exception.

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* Fix Python 3.4 installation issue.

* Avoid an OverflowError due to invalid EXIF data.

* Fix bug causing JPEG images to be saved without optimization :(

* JPEG files can now be saved with progressive encoding. By default, any image
with a dimension larger than 100px will be saved progressively. Configured
with the ``THUMBNAILER_PROGRESSIVE`` setting.

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* Fix packaging issue with old south migrations.