Fixed a bunch of failing tests

See merge request funkwhale/funkwhale!114

Federation signing requests

See merge request funkwhale/funkwhale!106

Resolve "Random issue on import"

Closes #121

See merge request funkwhale/funkwhale!113

Resolve "django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet. when missing env values"

Closes #140

See merge request funkwhale/funkwhale!112

Compute coverage on API tests

See merge request funkwhale/funkwhale!111

Switched to psycopg2-binary to avoid warning

See merge request funkwhale/funkwhale!110

Resolve "Populate timeline on first load"

Closes #141

See merge request funkwhale/funkwhale!109

endpoint

Resolve "Importer chokes on files with bad unicode characters"

Closes #138 and #120

See merge request !108

Resolve "Allow restricting allowed usernames"

Closes #139

See merge request funkwhale/funkwhale!107

Make more explicit the fact that most variables don't need editing on docker setups

See merge request funkwhale/funkwhale!105

Resolve "Only shuffle tracks after current index ?"

Closes #97

See merge request funkwhale/funkwhale!104

Resolve "Queue doesn't show current song by default"

Closes #131

See merge request funkwhale/funkwhale!103