create-instance can now take install options from command line args.
create-instance can now take install options from command line args.

Useful for automation. Any options not passed in will default to
interactive prompting, as previously.

jvirkki/heliod,jvirkki/heliod,jvirkki/heliod,jvirkki/heliod,jvirkki/heliod,jvirkki/heliod