default keyboard from file [proposed patch]

Binary package hint: gfxboot-theme-ubuntu

Hello,
I've created a patch for gfxboot-theme-ubuntu to have the default keyboard selection done from a file. Just in the same way the file "lang" works for the default language, with this patch there's the "keyb" file checked for the selection of the default keyboard.
I'm working on lucid, but seems working also in maverick and natty.

I've created it for my needs, if you think it's worthy to be included in ubuntu, here it is. :)
I'm not that good in programming, so the code might be bugged.

Regards,

Massimo