Add the initial project MoqSample

It is from the book Pro ASP.NET MVC 5
Use interface to replace the concrete class
Apply a discounter
Add the unit test project

1. Create the unit test project
2. Add a reference to the project MoqSample
Add the tests which will fail
Pass all of the unit tests
Adding a Unit Test for the ShoppingCart Class in the UnitTest2.cs File
Add Moq to the Visual Studio project

Install-Package Moq -projectname MoqSample.Tests
Revert "Add Moq to the Visual Studio project"

This reverts commit 800749f0f313581b51a0af0757fa12a1feb554ec.
Test method LinqValueCalculator.ValueProducts with mock
Create more complex Mock objects