I thought it may be useful to alter default  "Add filenames from
command line to new track" behavior, and made new cmd line switch
"-l", that can be set to anything, but useful values I tested are:

2 - load concatenated on one track (for jpegs)
6 - load as resources only

Default is 1 as before

Usage:

bin/cin -l 6  ~/*.jpg

or

bin/cin -l 2  ~/*.jpg

Please test if possible, and even merge if it doesn't add regressions