Avoid variable name conflict in mk_dreamplug_rootfs, and rename variable in mk_virtualbox_image for consistency.
Switched from wajig to apt-get to run non-interactively.
Merge pull request #35 from petterreinholdtsen/typo-apt-source

Avoid variable name conflict in mk_dreamplug_rootfs, and rename variable...
Merge branch 'master' into setup-using-deb
Fetch setup package from APT repository.  Move project setup script to setup.d/.