displit is designed to for a simple purpose: convert a directory with many multiple files (which are all
smaller than a certain medium, eg. DVD) and "splits" it into "volumes", looking for the optimal order to
get the best space/medium-number efficiency.
The actual action is either adding the files to mkisofs catalogs or real moving of files into new
directories (or creating links/symlinks). The method is not limited to files, whole directories can also
be handled this way (see various filesystem exploration modes).