New file:  billWk.rb

Description:
	New class "billWk" to replace billWk Struct in billCalendar to decouple into two separate  classes.
New File: firstDMY.rb

Description:
	 New class "FirstDMY" to replace FirstDMY Struct in billCalendar to decouple into two separate classes.
Modified Files:
	billWk.rb
	firstDMY.rb

Description:
	Added getter methods to return class variables
Modified: billCalendar.rb

Description:
	Changed dependency to BillWk and FirstDayMonthYear struct by separating both into
	two separate classes.  Doing so reduced some of the dependency within this file to
	those variables.  Reducing dependency improved coded by cleaning it up.