ISO build works with xorriso v1.2.4+

Found out I needed a newer version of xorriso to build the iso properly (https://lists.gnu.org/archive/html/info-gnu/2012-07/msg00012.html shows tha tthe -isohybrid-gpt-basdat -isohybrid-apm-hfsplus -isohybrid-gpt-basdat flags were added then and not in Ubuntu 12.04).

Cleaned up an extra -J flag and added some output.

While installing with the ISO, there's a failure of base-install, which works if you click continue and re-try the install from the menu. Not sure if this is because of a package dependency or something else with the repo.