* Add 'A' command to re-run SQL statement and show actual execution plan
(EXPLAIN ANALYZE) of a running query.
* Fixed 'E' command (EXPLAIN) to be UPDATE and INSERT safe.
* Updated the automake file so other targets like 'make dist' and
'make distdir' work.
* Fixed a bug so user table statistics can be sorted.
* Added a 't' command so that user table and index statistics can
display either cumulative or differential statistics.
* Fixed support for OS X, tested on v10.4.x, v10.5.x.
* Added support for OpenBSD, tested on v4.2.
