Add -L to efivar.1

Signed-off-by: Peter Jones <pjones@redhat.com>
Make "empty" be "zero" and add aliases for compatibility.

Other things seem to call the sentinal guid "zero" instead, so be
consistent with them.

Signed-off-by: Peter Jones <pjones@redhat.com>
Add efi_id_guid_to_name() and efi_name_to_id_guid()

These support {ID GUID} as a concept, a la
http://technet.microsoft.com/en-us/library/cc766223%28v=ws.10%29.aspx .

Signed-off-by: Peter Jones <pjones@redhat.com>
Add some vendor specific guids and the shell guid to our guid list.

I need to find more machines from other vendors and figure out what
vendor-specific ones they use a lot.

Signed-off-by: Peter Jones <pjones@redhat.com>
Make "make tag" sign by default.

Signed-off-by: Peter Jones <pjones@redhat.com>
Bump version to 0.14

Signed-off-by: Peter Jones <pjones@redhat.com>