New features that streamline the internal structure of many templates:

  * Feature: Configuration of target hostname via UIC_HOSTNAME will
    replace customized files in /files
  * Feature: Locale en_US.UTF-8 will now be configured by default
    (no need any more to supply adapted files)
  * Feature: Resolver file /etc/resolv.conf will always be automatically
    created if no custom resolver is supplied via /files
  * Feature: Automatically created resolver file /etc/resolv.conf will
    be based on data stored in UIC_PUBLICDNS
  * Feature: decent /etc/apt/sources.list autocreated by uic if not
    supplied via /files