Revert "stage2: install fdisk"

This reverts commit e7e04fc.

Update release notes

Update release notes

export-image: increase free space padding

Add .gitlab-ci.yml

Copy ssh and ssh.txt to boot partition

export-noobs: umount boot before archiving root

bsdtar does not add directories which are mountpoints. This removes /boot from
the archive and prevents init_resize.sh from working.

stage2: Noobs export

Add noobs export stage

fix alacarte menu hiding problem