Use FAT16 for EFI partition
When doing EFI install, use --removable, so that we replace the
default EFI loader
Update installer GUI to be EFI aware and reserve some space for
the 100MiB FAT partition that EFI uses
Get rid of the ugly old "gnop" trick for forced 4K mode,
use the sysctl to force 4K block sizes instead
Set active flags on newly created GPT partitions
Merge remote-tracking branch 'upstream/master'