Added code to generate an array to be used to determine which paycheck of the month a givien date falls in
Adding PaycheckUtils.getPaycheckNumber() functionality
Adding PaycheckUtils.getPaycheckNumberAsString() functionality
Added calculation variable for 'amount paid per period'
Added calculation variable for 'amount saved for rainy day'
Minor.. comments, etc
working with subgroups mainly.. added some methods, added some tests
Created an iterator which lists the names of groups in a deep hierarchical order