Added -long version of options.
Added short form of commands (create = n, etc.).
Added completion of ADD-OPTIONS, CREATE-OPTIONS and DEL-OPTIONS.
Allow set names with a name equal to a command.
Dissallow set names with a name equal to an option.
Allow set names with a name being only a dash `-' or starting with one.
Allow set names which equal filenames specified with -f.
Added checking of values for options:
timeout, hashsize, size, maxelem, range,family. If an invalid option
argument is detected further completion is refused.
Bugfix: Dissalow option completion request after list command.
Update Readme.md