* Add --root-directory support to syslinux-install.
* Present a list of devices where to write extlinux to in debconf handling.
* Use po files for extlinux scripts.
* Use po files for syslinux-themes-debian.
* Use /etc/extlinux.d/ mechanism.

* Ammend file search locations, so that e.g.:
  - /live instead of /isolinux or /syslinux can be used
  - to use boot.cfg and boot.bin instead of isolinux.cfg and isolinux.bin
