Mapentity

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**New features**

- Allow to specify headers to convertit_download() helper

**Bug fixes**

- Fix logging in management commands

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**New features**

- Check read permission of related model when serving media (attachment, map)
- Allow anonymous users to access media attached to public objects

**Bug fixes**

- Allow serving media other than attachments if not having read_attachment perm

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**Bug fixes**

- Fix tests derived from MapEntityTest

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**New features**

- Add geojson with full properties support to REST API

**Bug fixes**

- Fix geojson caching that returns sometime "None" instead of valid json

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**Packaging fixes**

- Fix missing ressources files in pypi release

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**Bug fixes**

- Pick up the ViewSet only if its model matches