Let Referenced Artworks point to standalone images

[towerofnix]

As Makin pitched: (#code-quarantine)

maybe some kind of special inline reference like:

Referenced Artworks:
- File References: misc/image.png
  Annotation: Album cover for Fat Husky the Rock Opera

We'd probably make this be in a dedicated media folder or something, like media/referenced-art, and then not sorted under subdirectories there (just a flat folder like flash-art). Then the syntax is maybe:

Referenced Artworks:
- File: fat-husky-the-rock-opera.png
  Annotation: Album cover for Fat Husky the Rock Opera

Of course those should be validated with missing/misplaced (comme #413 for lord's sakes).

These guys get displayed in the referenced-artworks page probably like normal, in the same list/grid to preserve the order in data, but with custom CSS to show that it doesn't actually link to some other track or album page.

Clicking the guy would just show the cover in large probably. We'd want that to only happen when you click the image, not the "link" surrounding it, which should be inert (no hover cue, clicking does nothing).