Added Basecode to Product

Added Voucher Type During Printing
Added Discount Report
Fixed Void bill table not getting cleared error
Added PAX to table
Removed Itital Setup button in MainForm as it was not doing anything

Tanshu.Accounts.Helpers/SelectorEvent.cs

@@ -0,0 +1,38 @@
+using System;
+
+namespace Tanshu.Accounts.Helpers
+{
+    public enum SelectorAction
+    {
+        Insert = 1,
+        Update = 2,
+        Delete = 3
+    }
+    public class SelectorEventArgs<T> : EventArgs
+    {
+        public SelectorEventArgs(T item, SelectorAction action)
+        {
+            Item = item;
+            Action = action;
+            Handled = false;
+        }
+
+        public T Item
+        {
+            get;
+            private set;
+        }
+
+        public SelectorAction Action
+        {
+            get;
+            private set;
+        }
+
+        public bool Handled
+        {
+            get;
+            set;
+        }
+    }
+}