feat(package): introduce a catch-all package angular.

modules/angular has no implementation, but depends on all the pieces
that make angular - core, di, directives, etc. It is the package that
all client apps will depend on.

modules/examples/pubspec.yaml

@@ -2,6 +2,8 @@ name: examples
 environment:
   sdk: '>=1.4.0'
 dependencies:
+  angular:
+    path: ../angular
   facade:
     path: ../facade
   reflection:
@@ -18,4 +20,4 @@ transformers:
       minify: true
       commandLineOptions: [--trust-type-annotations, --trust-primitives, --dump-info]
       #commandLineOptions: [--trust-type-annotations, --dump-info]
-      #commandLineOptions: [--dump-info]
+      #commandLineOptions: [--dump-info]

modules/examples/src/hello_world/index_common.js

@@ -1,4 +1,4 @@
-import {bootstrap, Component, Decorator, TemplateConfig, NgElement} from 'core/core';
+import {bootstrap, Component, Decorator, TemplateConfig, NgElement} from 'angular/angular';
 
 // Angular 2.0 supports 3 basic types of directives:
 // - Component - the basic building blocks of Angular 2.0 apps. Backed by

modules/examples/src/hello_world/index_static.js

@@ -1,6 +1,6 @@
 import *  as app from './index_common';
 
-import {Component, Decorator, TemplateConfig, NgElement} from 'core/core';
+import {Component, Decorator, TemplateConfig, NgElement} from 'angular/angular';
 import {Lexer, Parser, ChangeDetector} from 'change_detection/change_detection';
 import {LifeCycle} from 'core/life_cycle/life_cycle';