The iCalcreator 2.22 release requires PHP >= 5.3.0 due to major updates in the
selectComponents method.
The returnCalender/useCachedCalendar methods no longer stops PHP script (die),
  return TRUE on success!
iCalcreator.class.php is now split into class and function files and need a new
  PHP iCalcreator invoke.

UPDATES
 fcn selectComponent() and supporting fcns
   (major REWRITE due to a number of bug reports)
  - selectComponent() now also accepts arg 1 as datetime obj (as fromDate),
      arg 2 datetime obj (toDate) (and arg 3-6=null)
    fcns _recur2date() accepts arg2-4 as datetime obj
  - X-CURRENT-DTSTART/DTEND timezone OK!!
  - no X-CURRENT-DTEND if no DTEND (DUE) is set
  - only one reccurrence a day
  - a RDATE will overwrite any RRULE reccurrence, on an date (Ymd) basis.
  - any EXDATE must exactly (Ymd[His]) match any RRULE/RDATE recurrence for
      exclusion
  - the property X-RECURRENCE contains the RRULE+RDATE recurrence pattern
      number
  - new property X-OCCURENCE contains recurrence day number (ex. 'day X of Y')
 fcn returnCalender(), set Content-Disposition as 'inline' (when new 3rd
   arg=FALSE, default=TRUE)
 fcns saveCalendar() and useCachedCalendar(), removed (direcory/filename) args
   NOTE, the returnCalender/useCachedCalendar methods
     no longer stops PHP script (die), return TRUE on success!
 fcn parse(), mgnt of the first 'BEGIN:VCALENDAR' row (ex. remove BOM char)
 fcn parse(), support PHP context (new 2nd arg.)
 fcns, sprintf (YmdHis) mgnt
     removed obsolete functions
     split iCalcreator.class.php into class and function files.
     Moving common vcalendar and calendarComponent methods into upper abstract
       base class
     NOTE, new iCalcreator PHP invoke

BUG fixes
 fcn iCalUtilityFunctions::createTimezone(), timezone standard/daylight
   (default, date) start
 fcns newComponent(),getComponents(), index settings
 fcns _setDate, _setDate2, input arg sanitize
 fcn getProperty(duration) format 4 will now include timezone from DTSTART
 some code and doc. typo errors.