Update README

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
pam: add sshd for Debian daemon

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
Add sessions script

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
Merge branch 'master' into debian
Update Debian package

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>