feat(dart/transformer:: Initial commit of ctor stubs & annotation register

Closes #646

Closes #496

Closes #498

modules/angular2/test/transform/two_deps_files/expected/index.bootstrap.dart

@@ -0,0 +1,18 @@
+import 'package:angular2/src/reflection/reflection.dart' show reflector;
+import 'bar.dart' as i0;
+import 'foo.dart' as i1;
+import 'package:angular2/src/core/annotations/annotations.dart' as i2;
+import 'index.dart' as i3;
+
+main() {
+  reflector
+    ..registerType(i0.Component2, {
+      "factory":
+          (i1.MyContext c, String inValue) => new i0.Component2(c, inValue),
+      "parameters": const [const [i1.MyContext, String]],
+      "annotations": const [
+        const i2.Directive(context: const i1.MyContext(i1.contextString))
+      ]
+    });
+  i3.main();
+}