Fixed problem with classes
Re-fixed classes, still getting red squiggly. Added methods and para to HourlyEmployee.  Getting red squigglys for totalHoursPerYear
Added properties and methods to SalariedEmployee.  So far, no red squiggles
Added methods to HRService
Added TipCalculator interface with FoodTip and BaggageTip implementing TipCalculator
Added Classes to Lab3
Changed implementation to classes and added subclasses