Added testDefaults to test getOptionValue(Option, Object), testMultipleValues to test getOptionValue used in a loop to get multiple uses, and testGetOptionValues to test getOptionValues().
Added testDefaults to test getOptionValue(Option, Object), testMultipleValues to test getOptionValue used in a loop to get multiple uses, and testGetOptionValues to test getOptionValues().

ggchangan/jargs,purcell/jargs