Include more useful metadata in the ISO image

This updates the ISO image build to include some extra metadata:

 * set the Application ID
 * set the System ID to 'LINUX' to match other distros
 * set the Preparer ID to include useful information
 * set the Volume ID to include a meaningful, versioned name

This results in an ISO file that can be more easily classified without needing
to peek inside the box.

Signed-off-by: Daniel Pittman <daniel@rimspace.net>
Install, and reference, LICENSE and COPYING in the ISO image

This puts the LICENSE and COPYING files, which define the software license
terms, in the ISO image.  That helps users understand the terms that they are
receiving this software under.

It also references that file from the ISO9660 metadata, because why not?

Signed-off-by: Daniel Pittman <daniel@rimspace.net>
Merge pull request #39 from daniel-pittman/feature/master/better-iso-file-metadata

Better iso file metadata