feat(core): speed up view creation via code gen for view factories.

BREAKING CHANGE:
- Platform pipes can only contain types and arrays of types,
  but no bindings any more.
- When using transformers, platform pipes need to be specified explicitly
  in the pubspec.yaml via the new config option
  `platform_pipes`.
- `Compiler.compileInHost` now returns a `HostViewFactoryRef`
- Component view is not yet created when component constructor is called.
  -> use `onInit` lifecycle callback to access the view of a component
- `ViewRef#setLocal` has been moved to new type `EmbeddedViewRef`
- `internalView` is gone, use `EmbeddedViewRef.rootNodes` to access
  the root nodes of an embedded view
- `renderer.setElementProperty`, `..setElementStyle`, `..setElementAttribute` now
  take a native element instead of an ElementRef
- `Renderer` interface now operates on plain native nodes,
  instead of `RenderElementRef`s or `RenderViewRef`s

Closes #5993

modules/angular2/test/compiler/runtime_metadata_spec.ts

@@ -46,7 +46,7 @@ export function main() {
     describe('getMetadata', () => {
       it('should read metadata',
          inject([RuntimeMetadataResolver], (resolver: RuntimeMetadataResolver) => {
-           var meta = resolver.getMetadata(ComponentWithEverything);
+           var meta = resolver.getDirectiveMetadata(ComponentWithEverything);
            expect(meta.selector).toEqual('someSelector');
            expect(meta.exportAs).toEqual('someExportAs');
            expect(meta.isComponent).toBe(true);
@@ -70,7 +70,8 @@ export function main() {
 
       it('should use the moduleUrl from the reflector if none is given',
          inject([RuntimeMetadataResolver], (resolver: RuntimeMetadataResolver) => {
-           var value: string = resolver.getMetadata(ComponentWithoutModuleId).type.moduleUrl;
+           var value: string =
+               resolver.getDirectiveMetadata(ComponentWithoutModuleId).type.moduleUrl;
            var expectedEndValue =
                IS_DART ? 'base/dist/dart/angular2/test/compiler/runtime_metadata_spec.dart' : './';
            expect(value.endsWith(expectedEndValue)).toBe(true);
@@ -82,7 +83,7 @@ export function main() {
       it('should return the directive metadatas',
          inject([RuntimeMetadataResolver], (resolver: RuntimeMetadataResolver) => {
            expect(resolver.getViewDirectivesMetadata(ComponentWithEverything))
-               .toEqual([resolver.getMetadata(SomeDirective)]);
+               .toEqual([resolver.getDirectiveMetadata(SomeDirective)]);
          }));
 
       describe("platform directives", () => {
@@ -91,7 +92,10 @@ export function main() {
         it('should include platform directives when available',
            inject([RuntimeMetadataResolver], (resolver: RuntimeMetadataResolver) => {
              expect(resolver.getViewDirectivesMetadata(ComponentWithEverything))
-                 .toEqual([resolver.getMetadata(ADirective), resolver.getMetadata(SomeDirective)]);
+                 .toEqual([
+                   resolver.getDirectiveMetadata(ADirective),
+                   resolver.getDirectiveMetadata(SomeDirective)
+                 ]);
            }));
       });
     });