added comments

Data/IOrderItem.cs

-using System;
+/*
+* Ian Slater
+* IOrderItem
+* Parent Class for all Items that will go on an item 
+*/
+using System;
 using System.Collections.Generic;
 using System.Text;
 

Data/Order.cs

-using System;
+/*
+* Ian Slater
+* Order
+* Class to handle what is showon the ticket
+*/
+using System;
 using System.ComponentModel;
 using System.Collections.Generic;
 using System.Text;

PointOfSale/MenuSelectionControl.xaml.cs

-using System;
+/*
+* Ian Slater
+* MenuSelectionControl
+* Parent Class for all Items that will go on an item 
+*/
+using System;
 using System.Collections.Generic;
 using System.Text;
 using System.Windows;

PointOfSale/OrderSummaryControl.xaml.cs

-using System;
+/*
+* Ian Slater
+* OrderSummaryControl
+* Class to handle the showing of the ticket to the cashier 
+*/
+using System;
 using System.Collections.Generic;
 using System.Text;
 using System.ComponentModel;