New grubcfg module, ported from Thus.
grubcfg: set swap_uuid variable
grubcfg: group variables
New initcpiocfg module, ported from Thus.
Merge pull request #99 from calamares/grubcfg

New grubcfg module, ported from Thus.
Merge pull request #100 from calamares/initcpiocfg

New initcpiocfg module, ported from Thus.