Upgrade model names
Temporary clean admin files
Admin url must be on top to prevent some conflicts
Don't show document list in category admin
Fix initial data
verbose name for new category model
Temporary disable code with wrong classes

I know it's bad, it's just for the refactoring time
Restore inlines in different admin modules
Add prefix to url to avoid conflicts
Upgrade factories
Remove useless category parameter in document genartion task
Upgrade tests to use new classes
Fix some tests
Refactoring of data model.

Better classes names.
Move the download form to make some room
Add slug fields for organisations and categories
Modify document list view to get membership object
Add categories to some initial documents
Add property shortcuts to Category model
Add menu to pick current categories