- make sure shim package is part of the boot image for iso
  vmx and oem image types starting with openSUSE >= 12.3.
  The sim package contains the Microsoft signed efi module
  which is the entry point for UEFI secure boot
- fixed import of shim and grub efi modules. They are packaged
  as links to usr/lib/grub2/xxx-efi thus moving data from this
  directory will destroy the link target. We'd better copy it

- also allow integration of shim-opensuse key. If no Microsoft
  signed key is present we check if an opensuse key exists
- increased the vfat container image to be big enough to hold
  additional efi modules like the shim
- use mcopy to create efi structure in vfat image.
- v5.04.42 released