Rewrite build system to use vmdebootstrap and add support for Raspberry Pi.
Make sure to pass build values to the customize script.
Fix Raspbian Pi build.
Whitespace cleanup.
Remove obsolete clean command.
Typo.
Fix dreamup kernel and init setup.
Dreamplugs should have vfat /boot/ too.
Update virtualbox build dependency list.
Build Raspberry Pi as part of the weekly image build.
Reduce the size to 2.5 GiB.  Still enough space.
Remove hardware specific code.  Moved to freedombox-setup.
Avoid duplicate APT source and suite by passing it using environment variables.
Remove packages from list of packages to install that are also dependencies of freedombox-setup.
Making vmdebootstrap depend on vmdebootstrap again.

Otherwise, the vmdebootstrap predepends are never satisified and
vmdebootstrap can't complete.