Add tests from readme

src/Tomlyn.Tests/ModelTests/ReflectionModelTests.cs

@@ -12,6 +12,23 @@ namespace Tomlyn.Tests
 {
     public class ModelTests
     {
+        [Test]
+        public void TestSampleModel()
+        {
+            var toml = @"global = ""this is a string""
+# This is a comment of a table
+[my_table]
+key = 1 # Comment a key
+value = true
+list = [4, 5, 6]
+";
+
+            // Converts the TOML string to a `TomlTable`
+            var model = Toml.ToModel(toml);
+            Assert.AreEqual("this is a string", model["global"]);
+        }
+
+
         /// <summary>
         /// Serialize back and forth all integer/float primitives.
         /// </summary>