* Use Ubuntu 14.04.3 ISO instead ovf box
* Add a libvirt target as well
* Add additional build shell scripts from
bogdando/packer-atlas-example
* Use sudo for all shell commands
* Fix virtualbox guest additions build order
* Cleanups to reduce end image size
* Update README how to build and up both for vbox/libvirt
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>