refactor: rename annotations to metadata

BREAKING CHANGE (maybe)

Well as long as our customers use public API this should not be a
breaking change, but we have changed import structure as well as
internal names, so it could be breaking.

import:
  angular2/annotations => angular2/metadata

Classes:
  *Annotations => *Metadata
  renderer.DirectiveMetadata => renderer.RendererDirectiveMetadata
  renderer.ElementBinder => renderer.RendererElementBinder
  impl.Directive => impl.DirectiveMetadata
  impl.Component => impl.ComponentMetadata
  impl.View => impl.ViewMetadata

Closes angular#3660

Author: mhevery

docs/public-docs-package/index.js

@@ -5,7 +5,7 @@ module.exports = new Package('angular-v2-public-docs', [basePackage])
 
 .config(function(readTypeScriptModules) {
   readTypeScriptModules.sourceFiles = [
-    'angular2/annotations.ts',
+    'angular2/metadata.ts',
     'angular2/change_detection.ts',
     'angular2/core.ts',
     'angular2/di.ts',

modules/angular2/angular2.ts

@@ -7,7 +7,7 @@ export {commonBootstrap as bootstrap} from 'angular2/src/core/application_common
 // angular2_exports.ts. Re-exporting from angular2_exports.ts causes systemjs
 // to resolve imports very very very slowly. See also a similar notice in
 // bootstrap.ts
-export * from './annotations';
+export * from './metadata';
 export * from './change_detection';
 export * from './core';
 export * from './di';

modules/angular2/angular2_exports.ts

@@ -1,4 +1,4 @@
-export * from './annotations';
+export * from './metadata';
 export * from './change_detection';
 export * from './core';
 export * from './di';

modules/angular2/annotations.ts

@@ -7,7 +7,7 @@ export {bootstrap} from 'angular2/src/core/application';
 // angular2_exports.ts. Re-exporting from angular2_exports.ts causes systemjs
 // to resolve imports very very very slowly. See also a similar notice in
 // angular2.ts
-export * from './annotations';
+export * from './metadata';
 export * from './change_detection';
 export * from './core';
 export * from './di';

modules/angular2/bootstrap.ts

@@ -0,0 +1,4 @@
+library angular2.metadata;
+
+export 'package:angular2/src/core/metadata.dart';
+export 'package:angular2/src/core/compiler/interfaces.dart';

modules/angular2/metadata.dart

@@ -0,0 +1,48 @@
+/**
+ * @module
+ * @description
+ *
+ * Annotations provide the additional information that Angular requires in order to run your
+ * application. This module
+ * contains {@link ComponentMetadata}, {@link DirectiveMetadata}, and {@link ViewMetadata}
+ * annotations, as well as
+ * the {@link Host} annotation that is used by Angular to resolve dependencies.
+ *
+ */
+
+export {
+  ComponentMetadata,
+  DirectiveMetadata,
+  PipeMetadata,
+  LifecycleEvent,
+  ViewMetadata,
+  ViewEncapsulation,
+  QueryMetadata,
+  AttributeMetadata,
+  Attribute,
+  AttributeFactory,
+  Component,
+  ComponentDecorator,
+  ComponentFactory,
+  Directive,
+  DirectiveDecorator,
+  DirectiveFactory,
+  View,
+  ViewDecorator,
+  ViewFactory,
+  Query,
+  QueryFactory,
+  ViewQuery,
+  Pipe,
+  PipeFactory
+} from './src/core/metadata';
+
+export {
+  OnAllChangesDone,
+  OnChange,
+  OnDestroy,
+  OnInit,
+  OnCheck
+} from './src/core/compiler/interfaces';
+
+export {Class, ClassDefinition, TypeDecorator} from './src/util/decorators';

modules/angular2/metadata.ts

@@ -5,7 +5,7 @@
  */
 
 export {
-  DirectiveMetadata,
+  RenderDirectiveMetadata,
   DomRenderer,
   RenderEventDispatcher,
   Renderer,

modules/angular2/render.ts

@@ -6,7 +6,8 @@ import {implementsOnDestroy} from './pipe_lifecycle_reflector';
 
 
 /**
- * Indicates that the result of a {@link Pipe} transformation has changed even though the reference
+ * Indicates that the result of a {@link PipeMetadata} transformation has changed even though the
+ * reference
  * has not changed.
  *
  * The wrapped value will be unwrapped by change detection, and the unwrapped value will be stored.