* Various improvements for 'pmbootstrap export' (Fix#232)
* Do not try to generate the system image, but print a notice that
it was not generated yet
* Display export path
* New default path: /tmp/postmarketOS-export (instead of current
working dir)
* Create the export folder, if it does not exist yet
* Prettier output in the export message
* Adjust export message in install for consistency
Thanks, Pablo Castellano!
* Fixed typo
* Guide user about what are the next steps after flashing kernel and password
* Increased postmarketos-mkinitfs' pkgver and rewording
Changes requested:
https://github.com/postmarketOS/pmbootstrap/pull/179
* allows to build/extract/list initramfs, add/del hook
* rebuild the initfs whenever running install or trying to flash/boot it
* flasher flash/boot: automatically set up a minimal rootfs with kernel and initfs,
if it does not exist yet
