Move example fn widgets into sky/framework/components

sky/examples/fn/widgets/drawerheader.dart

Index: sky/examples/fn/widgets/drawerheader.dart
diff --git a/sky/examples/fn/widgets/drawerheader.dart b/sky/examples/fn/widgets/drawerheader.dart
deleted file mode 100644
index 052dad5120abe87c78cae3978d9786285baebdf7..0000000000000000000000000000000000000000
--- a/sky/examples/fn/widgets/drawerheader.dart
+++ /dev/null
@@ -1,46 +0,0 @@
-part of widgets;
-
-class DrawerHeader extends Component {
-
-  static Style _style = new Style('''
-    display: flex;
-    flex-direction: column;
-    height: 140px;
-    -webkit-user-select: none;
-    background-color: ${BlueGrey[50]};
-    border-bottom: 1px solid #D1D9E1;
-    padding-bottom: 7px;
-    margin-bottom: 8px;'''
-  );
-
-  static Style _spacerStyle = new Style('''
-    flex: 1'''
-  );
-
-  static Style _labelStyle = new Style('''
-    padding: 0 16px;
-    font-family: 'Roboto Medium', 'Helvetica';
-    color: #212121;'''
-  );
-
-  List<Node> children;
-
-  DrawerHeader({ Object key, this.children }) : super(key: key);
-
-  Node build() {
-    return new Container(
-      style: _style,
-      children: [
-        new Container(
-          key: 'Spacer',
-          style: _spacerStyle
-        ),
-        new Container(
-          key: 'Label',
-          style: _labelStyle,
-          children: children
-        )
-      ]
-    );
-  }
-}