Add bin/update-packages

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
bin/ping-box: remove explicit reference to eth0

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
Add Tmux configuration, .tmux.conf

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