Add a manual install script

[sfloess]

The wiki shows how to manually install. While this is good information, a script to do the needful is much more useful. Specifically the README.md has this:

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Manual

Clone this git repo and:

• copy the contents of kickstarts to /var/lib/cobbler/kickstarts.
• create a /var/lib/cobbler/snippets/flossware directory.
• copy the contents of snippets to /var/lib/cobbler/snippets/flossware.

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We should provide a bash script that can do the aforementioned.