ADDWORKINGDAYS{...} -- add working days to date

• Calculates the day that is a number of working days later or earlier then a given date
• Syntax: %ADDWORKINGDAYS{"format" date="date|$variable" delta="days" holidays="comma separated list of dates"}%
• Supported parameters:

  Parameter:	Description:	Default:
  date="date"	List of dates separated by comma. If delta is a positive number the latest of the dates is used. If delta is negative the earliest date is used. The dates can be in any format defined in System/TimeSpecifications (time is ignorred), or it can be the name of a TimeCalcPlugin storage name prefixed by a '$'. E.g. $myvar	today
  holidays="list of dates"	comma separated list of dates. The dates can be in any format defined in System/TimeSpecifications	none
  store="variablename"	Name of a variable in which the calculated date is stored. This variable can be used in another TimeCalcPlugin macro as an input date	none
  "format"	Format of the displayed date. Time is always 12:00 in returned result. The tokens are specified Time Format Tokens below	format defined by the {DefaultDateFormat} setting in configure
  delta="number of days"	Days can be positive for the future or negative for the past	0

• Example: %ADDWORKINGDAYS{"$year-$mo-$day date="23 Nov 2010" delta="25" holidays="24 Dec 2010, 25 Dec 2010, 01 Jan 2011"}%
• Note: When adding working days the start day is not included. The resulting enddate is included.