feat(dart/transform): Generate setter stubs.

Generate calls to Reflector#registerSetters from the information in
provided `Directive#bind` values.

This is only an initial attempt - it covers only the most basic values
of `bind`.

Closes #780

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

@@ -0,0 +1,26 @@
+library angular2.src.transform.generated;
+
+import 'package:angular2/src/reflection/reflection.dart' show reflector;
+import 'bar.dart' as i0;
+import 'package:angular2/src/core/annotations/annotations.dart' as i1;
+
+setupReflection() {
+  reflector
+    ..registerType(i0.MyComponent, {
+      "factory": () => new i0.MyComponent(),
+      "parameters": const [const []],
+      "annotations": const [
+        const i1.Component(
+            selector: 'soup', componentServices: const [i0.ToolTip])
+      ]
+    })
+    ..registerType(i0.ToolTip, {
+      "factory": () => new i0.ToolTip(),
+      "parameters": const [const []],
+      "annotations": const [
+        const i1.Decorator(
+            selector: '[tool-tip]', bind: const {'text': 'tool-tip'})
+      ]
+    })
+    ..registerSetters({"text": (i0.ToolTip o, String value) => o.text = value});
+}