Implement 'run3' command which will execute the MSBuild project.

Also create a 'dotnet new -t msbuild' template.

src/dotnet/commands/dotnet-new/CSharp_MSBuild/Program.cs

@@ -0,0 +1,12 @@
+using System;
+
+namespace ConsoleApplication
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World!");
+        }
+    }
+}