Merge branch 'release/0.3.1'

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

api/tests/music/test_tasks.py

api/tests/test_acoustid.py

api/tests/test_import_audio_file.py

api/tests/test_tasks.py

deploy/nginx.conf

dev.yml

docker/nginx/conf.dev

front/package.json

front/src/components/library/import/BatchDetail.vue

front/src/components/library/import/BatchList.vue

front/src/components/library/import/FileUpload.vue

front/src/components/library/import/FileUploadWidget.vue