alt_availis also used to work out
J, which means that it is a required entry. The change was necessary to allow development of
analyze_choices(). This change breaks earlier code.
attach()/detach()for parameters and data. Breaks all earlier code.
summary_opt. This list of options duplicated information found in other options and complicated maintainance.
save_optto reduce number of objects passed between functions.
attributes()of the ll value. This change should make it easier to extend functionality in the future. Breaks code prior to development version v.0.0.1.9007
split_data()was not always a vector, which caused