Upgraded celery to 4.1, added endpoint logic for fingerprinting audio files

api/Dockerfile

api/config/settings/common.py

api/config/settings/local.py

api/config/settings/test.py

api/docker/Dockerfile.test

..._api/music/migrations/0016_trackfile_acoustid_track_id.py

api/funkwhale_api/music/models.py

api/funkwhale_api/music/tasks.py

api/funkwhale_api/music/views.py

api/funkwhale_api/providers/acoustid/__init__.py

...le_api/providers/acoustid/dynamic_preferences_registry.py

api/funkwhale_api/providers/audiofile/tasks.py

api/funkwhale_api/taskapp/celery.py

api/install_os_dependencies.sh

api/requirements.apt

api/requirements/base.txt

api/tests/conftest.py

api/tests/music/test_api.py

api/tests/music/test_lyrics.py

api/tests/music/test_models.py