As we symlink `/usr/local/bin/virt-intsaller-debian` to `/usr/local/virtinstaller/virt-install-debian`, we have to also follow the symlink, when resolving the directory name.

roll out to msX servers

* tag '1.0.0':
  bump version 1.0.0

* release/1.0.0:
  bump version 1.0.0
  update README
  use /root/machine.conf
  update README
  improve doc/README
  set virtio model and bus
  update doc block
  document bootstrap
  add curl bug to README
  update README
  ipv6 and ipv4 impossible via preseed
  adapt for srv167
  IP config for srv168
  update ToDo
  update ToDo
  update ToDo

virtio claims to bring some additional performance

- add some custom variables that can be set on top of script
- use bridge=br0 instead of network=default

We need to set a serial console to our guest kernel so virsh can interact with it.
Keep in mind we have systemd on recent systems, which eases the setup

    edit /etc/default/grub
    add console=ttyS0 to the cmdline for booting
    update-grub

see http://0pointer.de/blog/projects/serial-console.html