Helper Function & WorkerPay Classes Implemented

These functions have been implemented (Return types, Modifiers.
Parameters & Overloaded Functions have been removed for breverity):

WriteToFile()
ReadFromFile()
ValidateName()
ValidatePay()
PadString()
DrawSeperator()
DrawVisualPayBar()
ConvertCharArrayToString()
ConvertStringToCharArray()
CalculatePay()

Different Employee types not start with thier employee type visible and
all properties in them have been made public to aid development
simplicity.