0.06: (2006-12-16)

* Support for closures was added (the "closure" option). This has
a trio of side effects: one is that scalar variables named
closure0, closure1, closure2, ... are placed in the caller's
package by make_sorter(); another is that those closure
variables are never fully deleted (memory leak); another is that any
"closure\d+" variables that are already in the caller's package
are obliterated.

* A bug incorrectly documenting a " style => 'ST' " syntax for
specifying the sort style was fixed.