- fixed creation of iso persistent write partition (bnc #825172)
  * fixed detection of cylinder count for isohybrid tables
  * use isohybrid EFI bootable image by default, the partition
    table written in this case allows standard partition device
    (e.g /dev/sda1) for EFI and protective MBR thus works in both
    worlds correctly and allows the creation of additional
    partitions without problems
  * don't use a fixed partition number, use the next one free
  * always create a filesystem on the write partition with
    the 'hybrid' label, even if the used overlay technique does
    not urgently requires this. The label helps to identify the
    write device on reboot
  * use parted instead of fdisk. fdisk is not suitable when adding
    partitions to the GPT, use kiwi's createPartitionerInput method
  * fixed clicfs cow file check, check clicfs only if clicfs is
    used, with the move to overlayfs there is a choice now
  * search for persistent write partition by a blkid label search
    and don't actually mount/umount the partition by label
  * syslinux >= 4.04 is required to make all this work
    correctly