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

Closes #646

Closes #496

Closes #498

modules/angular2/test/transform/two_deps_files/bar.dart

@@ -0,0 +1,13 @@
+library bar;
+
+import 'package:angular2/src/core/annotations/annotations.dart';
+import 'foo.dart';
+
+@Directive(context: const MyContext(contextString))
+class Component2 {
+  final MyContext c;
+  final String generatedValue;
+  Component2(this.c, String inValue) {
+    generatedValue = 'generated ' + inValue;
+  }
+}

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();
+}

modules/angular2/test/transform/two_deps_files/foo.dart

@@ -0,0 +1,8 @@
+library foo;
+
+const contextString = 'soup';
+
+class MyContext {
+  final String s;
+  const MyContext(this.s);
+}

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

@@ -0,0 +1,7 @@
+library web_foo;
+
+import 'bar.dart';
+
+void main() {
+  new Component('Things');
+}