Updated basebox upgrade script.
Disabled quiet, splash from kernel parameters.
Added three boot options: PC, Macbook, Chromebook.
Increase boot timeout from 1sec to 5sec.
Added placeholder packages for digabi-koe, digabi-ktp.
Renamed digabi-ktp to digabi-koetilapalvelin.
Added digabi-koe{,tilapalvelin} to required packages.