[WIP] Use trollop option parsing for git reference instead of VERSION file

The VERSION file path as part of the nightly build scripts was not reliable.

Additionally, it feels ugly that the build code used to generate the kickstarts for the appliances needs to have access to the VERSION file from the desired branch/tag/reference.
Oh I see...I've been just letting it give it's normal answer and just making sure that --help has expected values.  That way the caller can do --help to get the list if they need it.