Show thumbnail images for EPUB files #333

Nemo file manager currently doesn't seem to show thumbnail images for EPUB files. EPUB is a widely adopted e-book file format that often contains cover art, probably mostly in JPEG format. It would be very nice to have the cover art shown in Nemo.

I tried to add the feature with epub-thumbnailer script by Mariano Simone, but for some reason it didn't work. Mariano Simone assumes that the problem is not with the script, but the environment or the file manager.

I hope this is the right place to present this feature request. If it's not, I hope someone can tell what the right place is (Cinnamon?). Thanks!