Skip other audio files with -c (mp3, wav, etc.) about flac2all HOT 3 CLOSED

Changed type to enhancement.

It could be done, probably will put it under "-x" option, for "eXclude".

Note that I would have a related enhancement request : Be able to include only 
certain patterns to be copied over. In my case, it's because I don't want any 
of the original non-music files (nfo file, cue file referencing *.flac files, 
multiple artwork files), except for "cover.jpg" if present.

Extra added bonus : Replace ".flac" in file names with the relevant extension 
inside *.cue files when copying them over :-) ... in that case, I'd want to 
tell flac2all to include only "cdcover.jpg" and "*.cue".

Well, revision 61 supports to exclude files with the -x option:

  -x EXCLUDE, --exclude=EXCLUDE
                        exclude certain files from processing by PATTERN
                        (regular expressions supported)

The switch understands regular expressions, so you can filter the input path as 
you wish. 
Please verify and let me know if it works for you, or if you get any errors. 

Thanks!