Update to 0.14
    
    - add efi_id_guid_to_guid() and efi_guid_to_id_guid(), which support {ID GUID}
      as a concept.
    - Add some vendor specific guids to our guid list.
    - Call "empty" "zero" now, as many other places do.  References to
      efi_guid_is_empty() and efi_guid_empty still exist for ABI compatibility.
    - add "efivar -L" to the man page.
    
    Signed-off-by: Peter Jones <pjones@redhat.com>