!!Command line

The SimTree command line consists of a command given by its name 
([@c]add, [@c]remove, ...) and one or more options.

A command name is a word which denotes the command. For some commands so called
variants are defined. The name of such a variant is appended to the command
name separated with a - (i.e. [@c]dump-visual for the visual variant of the dump
command).

An option has a name which is preceded by --. Most options have additional 
arguments. Each command has a set of required options and accepts a (greater)
set of options.

Most options have a name consisting of several words separated by -. Each option
name may be abbreviated with the sequence of the first letters of each word,
i.e. the [@o]--simulation-parameter option may be abbreviated with [@o]--sp.
