Start salt-minion during provisioning in order to get signed keys
Language support with the param "lang"
Fix Debian wheezy matches
Debian keyboard settings are guessed from locale

Tested with en_US and fr_FR.UTF-8

Ref: http://anonscm.debian.org/cgit/d-i/console-setup.git/tree/debian/keyboard-configuration.config#n488
Ref: http://anonscm.debian.org/cgit/d-i/console-setup.git/tree/debian/keyboard-configuration.config#n392
Move SSH server install to a task
do not hardcode disk device