Replace options -name()- and -replace- with -saving()-.
-cfout- saves differences as .dta; adding -saving(, csv)- to save .csv.
Update summary table.
Bug fix: replace `match' with `nomatch'.

This was introduced when option noMATch was renamed as NOMATch.
Update warning messages.
Change order of deprecated option warning messages.
-check_id- checks the ID variable.
Rename locals for more -no*- options.
Add basic tests of string comparison options.