Incorporated remaining comments on user-input sample

Author: kwalrath

public/docs/_examples/user-input/dart/lib/app_component.dart

@@ -10,7 +10,7 @@ import 'package:user_input/little_tour_component.dart';
 
 @Component(
     selector: 'my-app',
-    templateUrl: 'app-component.html',
+    templateUrl: 'app_component.html',
     directives: const [
       ClickMeComponent,
       ClickMeComponent2,

public/docs/_examples/user-input/dart/lib/app-component.html renamed to public/docs/_examples/user-input/dart/lib/app_component.html

@@ -1,8 +1,6 @@
 // #docregion
 library user_input.little_tour_component;
 
-import 'dart:html';
-
 import 'package:angular2/angular2.dart';
 
 // #docregion little-tour

public/docs/_examples/user-input/dart/lib/little_tour_component.dart

@@ -6,5 +6,5 @@ dependencies:
   browser: ^0.10.0
 transformers:
 - angular2:
-    platform_directives: 'package:angular2/src/common/directives.dart#CORE_DIRECTIVES'
+    platform_directives: 'package:angular2/common.dart#CORE_DIRECTIVES'
     entry_points: web/main.dart