Django-filer-mod

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* Repackage for PyPI.

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* Repackage for PyPI.

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* Substantial UI/UX overhaul.
* Fixes some Django 1.9 issues.
* Drop support for Django older than v1.5.
* Fixes urls for changed files.
* Fixes an issue with KeyErrors during saving folder.
* Provides support for configuring the canonical URLs.
* Remove `FILER_STATICMEDIA_PREFIX` and use `staticfiles` for static files.
* Fixes searching for folders.
* Adds checkerboard-tile backgrounds to illustrate transparency in thumbnails.
* Other fixes.

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* Various bugfixes.
* Better Django 1.7 and 1.8 support.

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* Update Django 1.7 migrations because of change in django_polymorphic>=0.7.

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* Migrations in default locations for Django 1.7 and South>=1.0.
* jQuery isolation fixes
* Various bugfixes.