Install Debian using vmdb2 (v-i)
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This is a hack for my own amusement. It's not meant to be taken
seriously.

This is a rudimentary installer of Debian based on vmdb2. It has
nothing to do with debian-install, the official Debian installer,
known as d-i. I use d-i, but would like something better:

* I'd like something I can easily modify. d-i requires building
  special udeb packages for any software that's to be part of the
  installer. v-i is happy with normal debs.

* d-i uses preseeding for automating an installation. Preseeding means
  providing answers, in a file, to questions the package may ask
  during its installation. This is fine, if a little cumbersome, but
  only helps to answer questions the packages ask. v-i lets you have
  the full power of Ansible during initial installation.

On the other hand, d-i is mature software and tested by thousands. v-i
can just barely install my own Thinkpad x220 laptop.


Architecture
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The vmdb2-installer builds a bootable disk image with Debian. The
image boots with UEFI, and has everything you need to run vmdb2. You
write the image to a USB drive, boot off that, and run vmdb2 in the
booted system to install Debian onto the hard drive.

Thus:

- build system -> installer image
- installer image -> USB drive
- boot from USB drive
- run vmdb2 to install onto laptop hard drive

The image building uses vmdb2 as well. Things get a little recursive.


Hacking
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The main files are:

* v-i.vmdb -- the vmdb2 specification file for the installer image
* v-i.yml -- the Ansible playbook used by v-i.vmdb
* x220.vmdb -- the vmdb2 specification file to install onto an x220;
  this is used from the system booted from the image built by v-i.vmdb
* x220.yml -- the Ansible playbook used by x220.vmdb