[feature] add a command line mode option ?

[mzemb]

usefull for further automation: parsing of machination outputs without context lines

example: machination list instances:
get rid of the two first lines:
"Machine instances:"
"-------------------"

with maybe a --parse option ?

[mzemb]

As "machination list" gives everything (templates + instances), maybe a simplier change would be that "machination list templates" and "machination list instances" do not print context lines and though would be easily parsable.