Audiobook: Allow linking to PDF supplementary materials

[ZLoth 3]

There are some audiobooks, most notably the "Great Courses" which include a supplementary PDF that is available as part of the book. Emby should have a way to link or pick up a PDF that is in the same folder as an audiobook. 

[Luke 37086]

HI, yes it's an interesting idea that has come up before and is always possible for future updates. Thanks.

[ebr 14917]

Subset of this request: