Move example fn widgets into sky/framework/components

sky/examples/fn/widgets/icon.dart

Index: sky/examples/fn/widgets/icon.dart
diff --git a/sky/examples/fn/widgets/icon.dart b/sky/examples/fn/widgets/icon.dart
deleted file mode 100644
index 263d3f1711d0fc0f55943df7f37a64630cd86742..0000000000000000000000000000000000000000
--- a/sky/examples/fn/widgets/icon.dart
+++ /dev/null
@@ -1,34 +0,0 @@
-part of widgets;
-
-const String kAssetBase = '/sky/assets/material-design-icons';
-
-class Icon extends Component {
-
-  Style style;
-  int size;
-  String type;
-
-  Icon({
-    String key,
-    this.style,
-    this.size,
-    this.type: ''
-  }) : super(key: key);
-
-  Node build() {
-    String category = '';
-    String subtype = '';
-    List<String> parts = type.split('/');
-    if (parts.length == 2) {
-      category = parts[0];
-      subtype = parts[1];
-    }
-
-    return new Image(
-      style: style,
-      width: size,
-      height: size,
-      src: '${kAssetBase}/${category}/2x_web/ic_${subtype}_${size}dp.png'
-    );
-  }
-}