Instead of continuing to build upon the old images, these scripts
implement a reproducable way to generate new posbox images. The
generated images will be based on the latest stable Raspbian
release. The image will be created with the help of qemu-system-arm,
which will boot up the image and execute a script that will set up the
posbox image.
This way everything necessary to set up a posbox is readable in the
scripts and accompanying files, instead of being hidden in an image.