Slicer CLI automatically adds all parameters as command line args, so 'minGAArg' check from #75 always hits deprecation error. Work around this by setting out-of-range default value in CLI XML, and check for that value to indicate running under Slicer CLI defaults.
Also add test for basic CLI usage (only executed when built as Slicer extension).
Slicer CLI automatically adds all parameters as command line args, so 'minGAArg' check from #75 always hits deprecation error. Work around this by setting out-of-range default value in CLI XML, and check for that value to indicate running under Slicer CLI defaults.
Also add test for basic CLI usage (only executed when built as Slicer extension).