Change the name of Component.render to Component.build in Effen

sky/examples/fn/widgets/inksplash.dart

 part of widgets;
 
 const double _kSplashSize = 400.0;
 const double _kSplashDuration = 500.0;
 
 class SplashAnimation {
   AnimationGenerator _animation;
   double _offsetX;
   double _offsetY;
 
@@ skipping 62 matching lines @@
 
     _listening = true;
 
     onStyleChanged.listen((style) {
       setState(() {
         _inlineStyle = style;
       });
     });
   }
 
-  Node render() {
+  Node build() {
     _ensureListening();
 
     return new Container(
       style: _style,
       children: [
         new Container(
           inlineStyle: _inlineStyle,
           style: _splashStyle
         )
       ]
     );
   }
 }