- rewrite of the legacy BIOS/CSM support
  * removed the syncMBR attribute from the XML schema
  * changed the partition layout if firmware="efi" is specified.
    A new partition with flag 'bios_grub' is created
  * install the bios grub2 into the protective MBR which
    exists according to the EFI spec if a GPT is used. The
    special bios_grub flaged partition is required to allow
    grub2 to install
- update schema version from 5.7 to 5.8
  * removed syncMBR attribute and create an xsl template for it
- update XML description to new schema version
- removed experimental code from oem partition install block
  if the partition table did not fit the need kiwi tried to
  read-only mount the not yet installed image via a device
  mapper snapshot and starts a X session with gparted to
  make it easier for the user to setup the partition table.
  The idea is nice but there are too many pitfalls and it
  has been proven that it's better to offline prepare the
  install target and not do that while inside a minimal
  initrd system