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* Added signal to catch version deletion and make sure nb_version in versioned models is coherent
* Added test for this
* Made sure pending moderation data (that was automatic) and versions are deleted when a model is deleted.
* Added test for this.

Fixes #84

* Added new BaseModel /serializer/viewsets
* Change names of abstract models/serializers/viewsets
* Folder structure changed in tha backend
* Added some backend test
* Corrected bug related to moderation on non versionned modeles
* Corrected bug related to no post permissions
* Updated doc accordingly

Fixes #91

* Removed `model_config` from all models; updated `MyModelSerializer` to include a new `obj_info` field. Updated frontend to take the change into account. (Fixes #78)
* Removed `get_viewset_permissions` from most viewsets and added a generic getter in `MyModelViewset`.
* Added support for composable permissions classes :confetti\_ball: (Fixes #45)
* Cleaned config files: separated the files; added `defaults.yaml`
* Moved `shared` folder (content) to `backend.backend_app.config` (still accessible to frontend, but it's cleaner that way since this folder contains files concerning only the backend).
* Performance update with caching some attributes;
* Even cleaner backend dynamic imports (#46)
* Added a good chunck of documentation related to the backend (#74)
* Added checks (runned when server is started or indirectly with `make check_backend`)

Some of them were simply removed, oter were fixed.
From now on, the use of TODO is not permitted in the code.

Fixes #55

Added has_pending_moderation attribute
Tests also updated

Make use of optimization trick for is_member

Creation of a get_api_objs function that is easier to understand
More to come

not perfect but will do the trick for now

Also: fixed self.user not being set anymore

Closes #44

other fixes and linting

Repo structure complete redesign
Fixes #38