Implement a basic IME-aware input element

sky/examples/editor/editor_app.dart

Index: sky/examples/editor/editor_app.dart
diff --git a/examples/recipes/recipe_handler/recipe.mojom b/sky/examples/editor/editor_app.dart
similarity index 55%
copy from examples/recipes/recipe_handler/recipe.mojom
copy to sky/examples/editor/editor_app.dart
index 1a452572c7a79bc19024259f5a86bcab580ed14e..58239c96c379a8e25b64274cecce43f0b08f2d86 100644
--- a/examples/recipes/recipe_handler/recipe.mojom
+++ b/sky/examples/editor/editor_app.dart
@@ -2,12 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module recipes;
+import '../../framework/fn.dart';
+import 'input.dart';
 
-struct Ingredient {
-  string url;
-};
-
-interface Recipe {
-  GetIngredients() => (array<Ingredient> ingredients);
-};
+class EditorApp extends App {
+  Node build() {
+    return new Input();
+  }
+}