See #170: add a description field on tracks, albums, tracks

api/funkwhale_api/common/factories.py

api/funkwhale_api/common/migrations/0006_content.py

api/funkwhale_api/common/models.py

api/funkwhale_api/common/mutations.py

api/funkwhale_api/common/serializers.py

api/funkwhale_api/common/utils.py

api/funkwhale_api/federation/serializers.py

api/funkwhale_api/federation/views.py

api/funkwhale_api/manage/serializers.py

api/funkwhale_api/manage/views.py

api/funkwhale_api/music/metadata.py

...funkwhale_api/music/migrations/0046_auto_20200113_1018.py

api/funkwhale_api/music/models.py

api/funkwhale_api/music/mutations.py

api/funkwhale_api/music/serializers.py

api/funkwhale_api/music/tasks.py

api/funkwhale_api/music/views.py

api/requirements/base.txt

api/tests/common/test_models.py

api/tests/common/test_serializers.py