Make it easier to select language

[scootergrisen <scootergrisen@gmail.com>]

I have tested some live images from 
http://cdimage.debian.org/debian-cd/current-live/i386/iso-hybrid/ but it 
starts the desktop manager in english by default.

I add "locales=da_DK.UTF-8" in GRUB to start in my language but it would 
be nice if there was a easy way for people to start the system in they 
native language so they can try Debian in theyr own language.