Drop redundant display of album artist in track lists

See merge request !1041

* The album artist is already printed at the top (`Album containing N tracks, by Album Artist`), so printing it in the track list is redundant
* For collaboration tracks (X feat. Y), the displayed Artist entry will contain the album artist twice (e.g. "X / X feat. Y")
* Printing only the track artists is consistent with the way songs are displayed in the playback queue

Fixed websocket error under django 3

See merge request !1040

Frontend fixes 2

See merge request !1039

1028 - installation docs

Closes #1028

See merge request !1038

Dependency care - upgrade to django 3

See merge request !1037

Currently translated at 69.7% (665 of 954 strings)

Translation: Funkwhale/Funkwhale's server front-end
Translate-URL: https://translate.funkwhale.audio/projects/funkwhale/front/ar/

Currently translated at 84.1% (802 of 954 strings)

Translation: Funkwhale/Funkwhale's server front-end
Translate-URL: https://translate.funkwhale.audio/projects/funkwhale/front/nl/

Currently translated at 100.0% (954 of 954 strings)

Translation: Funkwhale/Funkwhale's server front-end
Translate-URL: https://translate.funkwhale.audio/projects/funkwhale/front/gl/

Currently translated at 100.0% (954 of 954 strings)

Translation: Funkwhale/Funkwhale's server front-end
Translate-URL: https://translate.funkwhale.audio/projects/funkwhale/front/gl/

Currently translated at 10.0% (95 of 954 strings)

Translation: Funkwhale/Funkwhale's server front-end
Translate-URL: https://translate.funkwhale.audio/projects/funkwhale/front/hu/

Currently translated at 52.1% (280 of 537 strings)

Translation: Funkwhale/Funkwhale's server front-end
Translate-URL: https://translate.funkwhale.audio/projects/funkwhale/front/sv/

Currently translated at 92.8% (885 of 954 strings)

Translation: Funkwhale/Funkwhale's server front-end
Translate-URL: https://translate.funkwhale.audio/projects/funkwhale/front/de/

See #170: Channel management and uploads

See merge request !1033

- use modals
- less proeminent button
- field styling/labels

Add kab dz locale

See merge request !1036

Fixed broken db with postgres:11.7

See merge request !1035

See #170: support for auth in RSS feed

See merge request !1034