[REQ] Cover art column for mp3

I take it as you got the script to work. Nice.

I would also prefer it if there was some easy way to obtain the coverart binary data and related size/type/etc directly from
DOpus without having to resort to perl, python or whatever.
Alternatively, being able to (load)/save coverart (from)/to a file, and being able to get related size/type/etc for the coverart
through DO would also work.

For reference, HERE is the location of the updated script.
Some minor fixes compared to the script in this one.