Added tester and DbComparer

DbMigrateTester/Program.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Windows.Forms;
+
+namespace DbMigrateTester {
+    internal static class Program {
+        /// <summary>
+        /// The main entry point for the application.
+        /// </summary>
+        [STAThread]
+        static void Main() {
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            Application.Run(new Forms.MainForm());
+        }
+    }
+}