Finish implementation of Type and Enum

examples/Dart/Test.dart

@@ -0,0 +1,14 @@
+import "./out/Test.dart";
+import "./out/TestAtom.dart";
+import "./out/TestEnum.dart";
+import "dart:convert";
+
+int main() {
+   var t = new TestAtom(10, false, "hello");
+   print(jsonEncode(t));
+
+   var t2 = TestEnum.VAL2;
+   print(jsonEncode(t2));
+
+   return 0;
+}