(dired-bunch-files): Put the arg FILES

(dired-bunch-files): Put the arg FILES
back as it was after temporary destrucive mods.
(dired-add-entry): Use dired-insert-directory to handle indentation.
Explicitly restore the line's marker character.
Preserve the old file name's text properties.
(dired-add-entry-do-indentation): Function deleted.
(dired-relist-file): Doc fix.
(dired-rename-file): Change argument names.
(foo-rename-file): New function.
(dired-do-hardlink): Use dired-hardlink.
(dired-hardlink): New function.
(dired-insert-subdir-doinsert): Use dired-insert-directory;
that handles indentation, text props and header line.
dired-readin-insert gets no args.
Use `last' instead of `reverse'.