refactor(core): introduce ComponentFactory.

Each compile template now exposes a `<CompName>NgFactory` variable
with an instance of a `ComponentFactory`.
Calling `ComponentFactory.create` returns a `ComponentRef` that can
be used directly.

BREAKING CHANGE:
- `Compiler` is renamed to `ComponentResolver`,
  `Compiler.compileInHost` has been renamed to `ComponentResolver.resolveComponent`.
- `ComponentRef.dispose` is renamed to `ComponentRef.destroy`
- `ViewContainerRef.createHostView` is renamed to `ViewContainerRef.createComponent`
- `ComponentFixture_` has been removed, the class `ComponentFixture`
  can now be created directly as it is no more using private APIs.

modules/angular2/test/platform/browser/bootstrap_spec.ts

@@ -24,7 +24,7 @@ import {provide, Inject, Injector, PLATFORM_INITIALIZER, APP_INITIALIZER} from '
 import {disposePlatform} from 'angular2/src/core/application_ref';
 import {ExceptionHandler, BaseException} from 'angular2/src/facade/exceptions';
 import {Testability, TestabilityRegistry} from 'angular2/src/core/testability/testability';
-import {ComponentRef_, ComponentRef} from "angular2/src/core/linker/dynamic_component_loader";
+import {ComponentRef} from "angular2/src/core/linker/component_factory";
 
 @Component({selector: 'hello-app', template: '{{greeting}} world!'})
 class HelloRootCmp {
@@ -194,7 +194,7 @@ export function main() {
        inject([AsyncTestCompleter], (async) => {
          bootstrap(HelloOnDestroyTickCmp, testProviders)
              .then((ref) => {
-               expect(() => ref.dispose()).not.toThrow();
+               expect(() => ref.destroy()).not.toThrow();
                async.done();
              });
        }));
@@ -204,7 +204,7 @@ export function main() {
          var app = platform(BROWSER_PROVIDERS).application([BROWSER_APP_PROVIDERS, testProviders]);
          app.bootstrap(HelloRootCmp)
              .then((ref) => {
-               ref.dispose();
+               ref.destroy();
                expect(() => app.tick()).not.toThrow();
                async.done();
              });
@@ -216,7 +216,7 @@ export function main() {
              HelloRootCmp3, [testProviders, provide("appBinding", {useValue: "BoundValue"})]);
 
          refPromise.then((ref) => {
-           expect(ref.hostComponent.appBinding).toEqual("BoundValue");
+           expect(ref.instance.appBinding).toEqual("BoundValue");
            async.done();
          });
        }));
@@ -226,7 +226,7 @@ export function main() {
          var refPromise = bootstrap(HelloRootCmp4, testProviders);
 
          refPromise.then((ref) => {
-           expect(ref.hostComponent.appRef).toBe((<ComponentRef_>ref).injector.get(ApplicationRef));
+           expect(ref.instance.appRef).toBe(ref.injector.get(ApplicationRef));
            async.done();
          });
        }));

modules/angular2/test/platform/browser/tools/spies.dart

@@ -1,8 +1,8 @@
 import 'package:angular2/testing_internal.dart' show SpyObject;
 import 'package:angular2/core.dart' show Injector, bind;
 import 'package:angular2/src/core/application_ref.dart' show ApplicationRef;
-import 'package:angular2/src/core/linker/dynamic_component_loader.dart'
-    show ComponentRef_;
+import 'package:angular2/src/core/linker/component_factory.dart'
+    show ComponentRef;
 import 'dart:js';
 
 @proxy
@@ -11,7 +11,7 @@ class SpyApplicationRef extends SpyObject implements ApplicationRef {
 }
 
 @proxy
-class SpyComponentRef extends SpyObject implements ComponentRef_ {
+class SpyComponentRef extends SpyObject implements ComponentRef {
   Injector injector;
 
   SpyComponentRef() {

modules/angular2/test/platform/browser/tools/spies.ts

@@ -1,6 +1,5 @@
 import {SpyObject} from 'angular2/testing_internal';
 import {Injector, provide} from 'angular2/core';
-import {ComponentRef} from 'angular2/src/core/linker/dynamic_component_loader';
 import {global} from 'angular2/src/facade/lang';
 import {ApplicationRef, ApplicationRef_} from 'angular2/src/core/application_ref';