Include the config directory and it's subdirectories in the zip file.
Include the config directory and it's subdirectories also in the xz and bz2 file.
Handle the addition of the config directory during install.

If the config directory is present, back it up before rewriting the boot
partition. Later on, copy those file back in.
Merge pull request #141 from diederikdehaas/create-config-dir

Create config dir