Added portuguese, spanish and german translations

See merge request funkwhale/funkwhale!371

Translations integration

See merge request funkwhale/funkwhale!370

Resolve "Add a link to admin"

Closes #202

See merge request funkwhale/funkwhale!364

Resolve "Optimize screen radio overview"

Closes #331

See merge request funkwhale/funkwhale!366

Resolve "Refreshing lists on browse page is causing the div to go down"

Closes #468

See merge request funkwhale/funkwhale!367

Resolve "Display track length in track lists (album view for instance)"

Closes #461

See merge request funkwhale/funkwhale!363

Rename CONTRIBUTING to CONTRIBUTING.rst for Gitlab formatting preview.

See merge request funkwhale/funkwhale!362

Rename occurences of the file through the documentation.

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

Minor fixes

See merge request funkwhale/funkwhale!361

Resolve "Artist showing up while not existing"

Closes #457

See merge request funkwhale/funkwhale!360

Resolve "Display information about the codec used when we click on a track or when browsing library under administration"

Closes #459

See merge request funkwhale/funkwhale!359

Replace default-cover.png

See merge request funkwhale/funkwhale!358

Recentrage de l'image pour éviter le décalage du bouton play au centre.
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Refocusing the image to avoid shifting the play button to the center.

Resolve "External stylesheets"

Closes #456

See merge request funkwhale/funkwhale!357

Update Pagination.vue

Closes #451

See merge request funkwhale/funkwhale!356

Fix: issue #451 "Missing cursor on pagination links"

Update Pagination.vue

See merge request funkwhale/funkwhale!355

Supprimé un bout de .css qui empêchait l'ombre et la bordure de la pagination d'apparaître.

Resolve "Date display bug when not tagued with MusicBrainz (Picard)"

Closes #376

See merge request funkwhale/funkwhale!354

Resolve "Track already in favorites do not appear in player"

Closes #398

See merge request funkwhale/funkwhale!353

Resolve "Investigate Howler.js as a way to manage low-level audio and get cross-browser compatibility"

Closes #392 and #390

See merge request funkwhale/funkwhale!351

Resolve "Top bar alignement issue in Admin tabs"

Closes #395

See merge request funkwhale/funkwhale!352

Resolve "Artist button is white on white when hovered, on Album page"

Closes #393

See merge request funkwhale/funkwhale!350