It may happen operator wants to get the built command instead of all the
parameters. This change injects a new entry in the dict output, showing
what command way actually launched.
This patch also takes the opportunity to add missing dots to some
documentation lines.
This change reorder the parameters so that we get the mandatory one at
the top, then alphabetically order the other bellow.
It also adds the returned values.
Cédric Jeanneret
Felix Fontein
Brian Coca