2.4.4 ###########################################  thanks / james
Typo error / sourceforge bug 1899059
Function createDtstart

2.4.5 ###########################################  thanks / Mork
Bug when deleting property
Function deleteProperty
All properties which allow multiple occurence:
ATTACH, ATTENDEE, CATEGORIES, COMMENT, CONTACT, DESCRIPTION, EXDATE, EXRULE,
FREEBUSY, RDATE, RELATED-TO, REQUEST-STATUS, RESOURCES, RRULE, TZNAME

2.4.6 ###########################################  thanks / Mork
Implemented replace Property functionality, added index parameter
Function setProperty
All properties which allow multiple occurence:
ATTACH, ATTENDEE, CATEGORIES, COMMENT, CONTACT, DESCRIPTION, EXDATE, EXRULE,
FREEBUSY, RDATE, RELATED-TO, REQUEST-STATUS, RESOURCES, RRULE, TZNAME

2.4.7 ###########################################
Adapt xcal output format for Related-To
Function createRelatedTo

2.4.8 ########################################### 
Recoding all set/createFunctions, empty input value, impl. config allowEmpty
Functions _createElement, _format_date_time, duration2date
Any calendar config changes now updates subComponents directly
All setProperty functions returns TRUE on success, FALSE on ERROR

2.4.9 ###########################################
Include components from function selectComponents in function sort
Updated functions selectComponents, sort

2.4.10 ###########################################
Index bug
Function deleteComponent

2.4.11 ###########################################
All properties with only one occurence now allows consecutive fetch
Functions getProperty and setXprop
Updated fetch of properties with multiple occurence:
ATTACH, ATTENDEE, CATEGORIES, COMMENT, CONTACT, DESCRIPTION, EXDATE, EXRULE,
FREEBUSY, RDATE, RELATED-TO, REQUEST-STATUS, RESOURCES, RRULE, TZNAME

2.4.12 ###########################################
Index bug when parsing multiple categories/resources
Function parse

2.4.13 ###########################################
Manage standard/daylight components as vtimezone
Functions getConfig, deleteProperty, getProperty, setComponent

2.4.14 ###########################################
Updated default setting of unique_id
Function getConfig on component level

2.4.15 ###########################################
return FALSE when property not set
Function getProperty

2.4.16 ###########################################
Major bug UTC offset
Refactored all date setfunctions
COMPLETED, CREATED, DTSTAMP, LAST-MODIFIED
DTEND, DTSTART, DUE, RECURRENCE-ID
EXDATE, RDATE
EXRULE, RRULE
DURATION
TRIGGER
FREEBUSY
Changed set parameters for TRIGGER and FREEBUSY
Verifying input date combinations using 24000 phpunit testcases
Updated internal functions _existRem , _format_duration
New internal functions: _isArrayDate, _isArrayTimestampDate, _isOffset,
 _timestamp2date

2.4.17 ###########################################
Bug, missing input date combinations
Functions _setDate, _setDate2
Verifying input date combinations using 24000 phpunit testcases

2.5.1 ###########################################  thanks / Noel
Memory consumption problem

2.5.2 ###########################################
Bug parsing Request-Status
Function parse

2.5.3 ###########################################  thanks / Noel
Command-line execute adaptation
If no $_SERVER exists, 'localhost' is set (PHP gethostbyname)

2.5.4 ###########################################
Obsolete function removed
Function validDate