script: Faulty reference to $dir causing kickstart fault.

All scripts where updated to consume $home_dir but the create machines
script was still erronously referencing the initial $dir in places.

This commit ensure the correct directories are used allowing stratus
and the actual binary files to live apart.
kickstartserver: Ensure files directory exists in repository.
Merge branch 'master' of github.com:bradleybeddoes/stratus