Change X.org gpu config.

  - Rename the gpu configuration file for X.org to a generic one in DRP phase 5.

  - Change documentation to reflect that change.

  - Minor document fixes.
efiup improvements.

  - Implement the same method as DRP scripts to load settings from rc files or use the default ones;

  - Make it process all files required for a UEFI boot (elilo.efi, elilo.conf, vmlinux and initrd.gz);

  - Make output a bit more meaningful.