Implements new debug string that outlines the bound script

PorygonSharpTests/UnitTest1.cs

@@ -153,5 +153,21 @@ namespace PorygonSharpTests
             var hash = "Foo".ScriptHash();
             Assert.AreEqual(193501609, hash);
         }
+        
+        [Test]
+        public void TestBoundTreeString()
+        {
+            using (var script = new Script("return 10 + 500"))
+            {
+                var tree = script.GetBoundTreeString();
+                const string expectedString = @"BlockStatement
+	ReturnStatement
+		BinaryExpression: addition (number)
+			LiteralInteger: 10 (number)
+			LiteralInteger: 500 (number)";
+                Assert.AreEqual(expectedString, tree);
+            }
+        }
+
     }
 }