update templates/boot/grub/ to grub version 1.98+20100617-1, extend grub.cfg, update...

update templates/boot/grub/ to grub version 1.98+20100617-1, extend grub.cfg, update scripts/create-grub-dir.sh

scripts/create-grub-dir.sh needs to be adjusted for current
grub version because grub-mkimage is in another package
and requires a new option (--format).

grub.cfg now insmods part_gpt and part_msdos by default, otherwise
accessing partitions using "set root (hd0,..." isn't possible.
Also added support for ${kernelopts}, suggested by Alexander 'Leo'
Bergolth, see http://lists.mur.at/pipermail/grml/2010-June/004822.html

templates/boot/grub/ has been updated to grub version 1.98+20100617-1.

Signed-off-by: Michael Prokop <mika@grml.org>