argparse is available in python2.7 (archlinux) and on python-argparse package in debian. So
we add a dependency to this package.

this already more easy unchrooting after failure by chrooting again,
solving issue and exiting (which remove mounts again)

compute of real path of images to check integrety was poorly coded. Fix it!

chroot failed when root is missing dirs before resolv.conf fil

This is done to be able to use preparation from scripts

new option --preserve, -p is added

completion and is add -p <tab> doesnt work because cword is used and doesn't escape options from the list

gonnet-ifier...

info command is used to get information about an image. It will replace list command

this command is and helper to chroot inside payload mounting /{proc,sys,dev,dev/pts} fs
inside the chroot and disable daemon restart

this also fix bad display of all changelog in verbose mode

we now have a changelog command, no needs to overload list output