2009-09-16 (1.2.018)
      * debug.lisp: 
 	** improved logg function:
	   - added option :error,
	   - format-controller can be a condition object,
	++ added condition helped-condition, which contains help-key slot,
	   and subclasses simple-herror and simple-hwarning,
	++ added signaling functions herror, hcerror, and hwarn.

2009-05-05 (1.2.017)
      * debug.lisp: general log facility added:
	++ *log-stream* and *log-options* specials,
	++ logg function.
      * lw-compat.lisp:
	++ added when-let* macro;
	** string-append turned into function.
      * file-utils.lisp (a la lw-compat):
	++ added functions current-pathname, pathname-location
      * ys-stub.lisp: added thys-preference function.

2009-03-05 (1.2.016)
      * functions.lisp:
	++ added char-position, split-seq-if.
	++ added split compartible wiht cl-pre:split but based on
	   lw:find-regexp-in-string (Emacs-like regular expressions).

2008-11-23 (1.1.015)
      * locale.lisp: ~f was improved on LispWork - now atsign (@) works
	for non-negative numbers even if both w are d are null.

2008-11-19 (1.1.014 Professional Edition only)
      * systema.lisp
	++ new %initialize-preferences function was defined in order to set
	   global values for preferences variables; the function was added as
	   "Set special preferences" action to the "Initialize product" list.

2008-08-14 (1.1.013)
      * file-utils.lisp
	++ added function pathname-equal.

2008-05-29 (1.1.012)
      * functions.lisp
	++ added function split, an equivalent of Edi Weits's cl-ppcre
	   split but based on LispWorks lw:find-regexp-in-string.
      + file-utils.lisp added.

2008-04-16 (1.1.011)
      * functions.lisp
	** insert now allows negative integers as after or before arguments
	   for specifing positions form the end of a list,
	++ added string-append* accepting the last spread argument.

2008-03-21 (1.1.010)
      * locale.lisp
	** fixed bug in function ~$ when printing with thousand separator.

2008-01-24 (1.1.009)
      * meta-parse.lisp
	** amended list match procedure in order to treat top-level patterns correctly,
	++ list match was augmented by dotted patterns.

2007-10-14 (1.1.008)
      * debug.lisp
	++ added macro with-restarts binding control variables %allow-quit% and
	   %allow-debug%, which were borrowed from ywidgets/capi-hacks.lisp

2007-08-31 (1.1.007)
      * Adapted and tested for LispWorks 5.0.
	** systema.lisp: featured out the stuff relied on the partial-sort package.

2007-02-28 (1.0.006)
      * systema.lisp: the patch-module function now
	++ additionally accepts the callback paramater,
	** can handle a list of patch functions that are hard-wired into the delivered.

2007-01-14 (1.0.005)
      * ys-product.lisp
	++ slot-documentation

2005-09-03 (0.1.000)
      * locale.lisp:
	** fixed versions of ~f and ~e for the platforms other than Windows or Linux.
	++ added decline-word, genderize-word, and odinalize-tail.