* doc/guix.texi (USB Stick Installation): Mention UEFI.
(Preparing for Installation): Add notes about EFI System Partition, and
mounting partitions before init.
(Proceeding with the Installation): Mention the GRUB-EFI package.
(Using the Configuration System): Lightweight desktop is now a UEFI system.
(GRUB Configuration): Expand on package field. Add indexes.
* gnu/system/examples/lightweight-desktop.tmpl: Adjust to native EFI configuration.
* gnu/system/examples/lightweight-desktop.tmpl: While it is currently
unknown if Bob has a brother, it is sufficiently documented that Alice
is, in fact, Bob's sister.
