change useradd to adduser and add echo "pass\npass"
remove \n when adding an aliases (the linux flux >> append a new line at
the end of the file).
add <pre> TODO: a better rendering
add \n
change div to pre
change how to write mail in /etc/aliases (wrong crededential use sudo
tee -a)
Merge pull request #21 from TelecomEtude/jeremiejigajoutadmin

Debug ajout mail dans /etc/aliases, changement useradd en adduser.