2008-12-22 (1.1.010) Dmitriy Ivanov
      * print-time.lisp:
 	++ added d-long-princ-to-string to output in long localized manner.

2008-12-22 (1.1.009) Dmitriy Ivanov
      * print-time.lisp: localized printer ~ts now format hours with "~D" instead of
	"~2,'0D" influencing ts-format-to-string and t-format-to-string.

2008-11-30 (1.1.008) Dmitriy Ivanov
      + interval.lisp, parse-interval.lisp:
	++ added interval and dow-interval structure types,
	++ added series structure type implementing time series.

2007-02-09 (1.0.007) Dmitriy Ivanov
      * utils.lisp:
	** renamed the end-of-... family of functions to finish-of-...
	++ added merge-date-time.

2006-10-04 (1.0.006) Dmitriy Ivanov
      * utils.lisp: to comply to SQL standard functions:
	* current-timestamp changed signature to: &optional precision encode-type,
      	+ added localtimestamp, signature: &optional precision.

2005-08-29 (0.3.005) Dmitriy Ivanov
      * basics.lisp: valid-ywd-date-p added.
      * core.lisp:
	++ %ywd-lt-day added.
	** encode-date and encode-local-time check for negative month now.
      *	parse-time.lisp: meta-parse-iso-8601 now handles W designator
	and returns calendar week number as negative month.

2005-05-19 (0.3.004) Dmitriy Ivanov
      * core.lisp: %lt-day-week, %lt-day-week-iso added.
      * print-time.lisp: :ywi and :yw date format specifiers introduced.
      * utils.lisp: the week function indroduced;
	:week is accepted as an argument of time-component.

2004-01-16 (0.2.003) Dmitriy Ivanov
      * duration concepts elaborated, many changes in several .lisp-files.

2003-12-16 (0.2.002) Dmitriy Ivanov
      * timezone.lisp : %ymd-timezone : changed parameter default (hours 0).
 	Assuming midday 12:00 instead of midnight 00:00 as hours value for dates
	leads to a comparison anomaly or complex implementation, 
	but does not benefit much. So drop the initial decision.
      * ylib/meta-parse.lisp : disable-meta-syntax : typo fixed.

2003-12-08 (0.1.000) Dmitriy Ivanov
      * Initial public release.