refactor: export core APIs from angular2/core

This change moves many APIs to the angular2/core export.

This change also automatically adds FORM_BINDINGS in
the application root injector.

BREAKING CHANGE:
    Many dependencies that were previously exported from specific
    APIs are now exported from angular2/core. Affected exports, which
    should now be included from angular2/core include:

    angular2/forms
    angular2/di
    angular2/directives
    angular2/change_detection
    angular2/bootstrap (except for dart users)
    angular2/render
    angular2/metadata
    angular2/debug
    angular2/pipes
Closes #3977

modules/angular2/src/router/hash_location_strategy.ts

@@ -1,5 +1,5 @@
 import {DOM} from 'angular2/src/core/dom/dom_adapter';
-import {Injectable} from 'angular2/di';
+import {Injectable} from 'angular2/src/core/di';
 import {LocationStrategy} from './location_strategy';
 import {EventListener, History, Location} from 'angular2/src/core/facade/browser';
 

modules/angular2/src/router/location.ts

@@ -2,7 +2,7 @@ import {LocationStrategy} from './location_strategy';
 import {StringWrapper, isPresent, CONST_EXPR} from 'angular2/src/core/facade/lang';
 import {EventEmitter, ObservableWrapper} from 'angular2/src/core/facade/async';
 import {BaseException, isBlank} from 'angular2/src/core/facade/lang';
-import {OpaqueToken, Injectable, Optional, Inject} from 'angular2/di';
+import {OpaqueToken, Injectable, Optional, Inject} from 'angular2/src/core/di';
 
 export const APP_BASE_HREF: OpaqueToken = CONST_EXPR(new OpaqueToken('appBaseHref'));
 

modules/angular2/src/router/path_location_strategy.ts

@@ -1,5 +1,5 @@
 import {DOM} from 'angular2/src/core/dom/dom_adapter';
-import {Injectable} from 'angular2/di';
+import {Injectable} from 'angular2/src/core/di';
 import {EventListener, History, Location} from 'angular2/src/core/facade/browser';
 import {LocationStrategy} from './location_strategy';
 

modules/angular2/src/router/pipeline.ts

@@ -1,7 +1,7 @@
 import {Promise, PromiseWrapper} from 'angular2/src/core/facade/async';
 import {ListWrapper} from 'angular2/src/core/facade/collection';
 import {Instruction} from './instruction';
-import {Injectable} from 'angular2/di';
+import {Injectable} from 'angular2/src/core/di';
 
 /**
  * Responsible for performing each step of navigation.

modules/angular2/src/router/route_data.ts

@@ -1,4 +1,4 @@
-import {OpaqueToken} from 'angular2/di';
+import {OpaqueToken} from 'angular2/src/core/di';
 import {CONST_EXPR} from 'angular2/src/core/facade/lang';
 
 export const ROUTE_DATA: OpaqueToken = CONST_EXPR(new OpaqueToken('routeData'));

modules/angular2/src/router/route_registry.ts

@@ -30,7 +30,7 @@ import {
   RouteDefinition
 } from './route_config_impl';
 import {reflector} from 'angular2/src/core/reflection/reflection';
-import {Injectable} from 'angular2/di';
+import {Injectable} from 'angular2/src/core/di';
 import {normalizeRouteConfig} from './route_config_nomalizer';
 import {parser, Url, pathSegmentsToUrl} from './url_parser';
 

modules/angular2/src/router/router_outlet.ts

@@ -2,9 +2,9 @@ import {Promise, PromiseWrapper} from 'angular2/src/core/facade/async';
 import {StringMapWrapper} from 'angular2/src/core/facade/collection';
 import {isBlank, isPresent, BaseException} from 'angular2/src/core/facade/lang';
 
-import {Directive, Attribute} from '../core/metadata';
-import {DynamicComponentLoader, ComponentRef, ElementRef} from 'angular2/core';
-import {Injector, bind, Dependency, UNDEFINED} from 'angular2/di';
+import {Directive, Attribute} from 'angular2/src/core/metadata';
+import {DynamicComponentLoader, ComponentRef, ElementRef} from 'angular2/src/core/compiler';
+import {Injector, bind, Dependency, UNDEFINED} from 'angular2/src/core/di';
 
 import * as routerMod from './router';
 import {ComponentInstruction, RouteParams} from './instruction';