The hassbian-config script is a framework for configuring the installed packages on the system.
It utilises the install scripts with minor modifications for inclusion into the framework.

hassbian-config defines three operations: install, show and info

install will install the named software package (hassbian-config calls this a "suite")
show will show all available installers.
info will show information about the suite selected.

As of this version, there is no kind of state kept by hassbian-config; this will likely need to be changed.

… available suites.

…sh to be "just" another suite.

Correct /bin/sh stanza which precludes the "function" keyword
Restore old functionality if installer is run standalone.