Dependencies: on Debian systems, you need to install the following
packages:

    coreutils
    dpkg-dev
    findutils
    fuse
    fuseiso
    isolinux
    libvirt-clients
    openssh-client
    openssl
    rsync
    virtinst
    xmlstarlet
    xorriso
    libjson-perl


Download Debian stable's netinst ISO image and verify its integrity:

	~$ ./download-iso --arch=amd64 --rsync-host=ftp.se.debian.org
	Verifying integrity (OpenPGP signature on SHA-512 manifest)...
	gpgv: Signature made Sun 18 Sep 2016 06:23:45 PM CEST
	gpgv:                using RSA key DA87E80D6294BE9B
	gpgv: Good signature from "Debian CD signing key <debian-cd@lists.debian.org>"
	Verifying integrity (SHA-512 checksum)... OK
	./dist/debian-8.6.0-amd64-netinst.iso


Create a new transient virtual machine:

	~$ ./tdfvm-install \
		--ssh=guilhem@falco.documentfoundation.org \
		--iso=./dist/debian-8.6.0-amd64-netinst.iso \
		-u$USER -p --authorized-keys=$HOME/.ssh/authorized_keys \
		-o ./vm170 \
		--memory=2048 \
		--disk=/var/lib/libvirt/images/vm170.img,size=12,format=raw,cache=none,aio=native \
		--network=network=default \
		--graphics=spice,listen=socket  \
		--transient \
		vm170
	[...]
	Salt minion MD5 fingerprint:
	        ce:1f:7c:28:ad:65:0b:b6:2c:ab:ad:6a:f6:2d:71:fb

	SSH hostkey fingerprints:
	        256 SHA256:mYzCFf8SRQFqFOMjoqssWOtjFP79q64iNx5j7PnQYBQ /etc/ssh/ssh_host_ed25519_key (ED25519)
	        4096 SHA256:Hc5yXrUn8OCYC489dr7bKqsHKrfveihCPqwlC+jQD/I /etc/ssh/ssh_host_rsa_key (RSA)


  --ssh=guilhem@falco.documentfoundation.org
    Connect to falco's remote libvirtd, using SSH2 for transport.
    (Note: the user needs to be in the 'libvirt' group.)

  --iso=./dist/debian-8.6.0-amd64-netinst.iso
    Specify the path to the installation ISO image to preseed.

  -u$USER, --username=$USER
    Create new username $USER.

  -p, --password
    Prompt for $USER's new password.

  --authorized-keys=$HOME/.ssh/authorized_keys
    Copy the given authorized_keys(5) filename to ~$USER/.ssh/authorized_keys
    on the guest.

  -o./vm170, --output=./vm170
    Optional directory where to export the VM's XML definition and its SSH &
    Salt key material.  Note that the fingerprints are printed before exiting
    regardless of whether --output is specified or not.

  --memory=2048
    Allocate 2GiB for the guest (a VirtIO memory balloon device is always
    attached to the guest).

  --disk=/var/lib/libvirt/images/vm170.img,size=12,format=raw,cache=none,aio=native
    Use file /var/lib/libvirt/images/vm170.img as storage media for the guest;
    if the file doesn't exist, a 12GiB raw image is allocated.  The disk is
    attached to a VirtIO bus.  See virt-install(1) for details.

  --network=network=default
    Connect to the host's "default" virtual network.  (Use "--network=none" to
    disable networking on the guest, and "--network=user" to connect to the LAN
    using SLIRP.)  The NIC is attached to a VirtIO bus.  See virt-install(1)
    for details.

  --graphics=spice,listen=socket
    Export the guest's console using the Spice protocol, which can be accessed
    by connecting to a libvirt generated UNIX socket on the host's filessystem.
    (Specify "listen=none" instead to forbid non-local connection using
    `virt-viewer --attach`.)

  --transient
    Create a transient libvirt VM.