Misc. forgot all changes

Working on Cashier Checkout

Tanshu.Accounts.SqlDAO/Fluent/SetupStore.cs

@@ -51,7 +51,8 @@ namespace Tanshu.Accounts.Repository
                     c.Add<CustomForeignKeyConvention>();
                     c.Add<ClassConvention>();
                     c.Add<CascadeConvention>();
-                    c.Add<NotNullConvention>();
+                    //c.Add<AllowNullConvention>();
+                    //c.Add<NotNullConvention>();
                     //c.Add(DefaultLazy.Never());
                     //c.Add<EnumConvention>();
                 });