fix build after the latest debian jessie changes

This PR packages the work done during the investigation which has lead to https://github.com/boot2docker/boot2docker/pull/543.

ISOLINUX and SYSLINUX have both been updated on Debian jessie and files have moved around a bit.

This PR also changes the package `module-init-tools` to `kmod`.

As of right now, debian2docker is using systemd by default because that's what Debian is using.