move HelloWorld to be a peer of SampleApp

example/mac/HelloWorldNSView.mm

Index: example/mac/HelloWorldNSView.mm
diff --git a/experimental/SkiaExamples/SkExampleNSView.mm b/example/mac/HelloWorldNSView.mm
similarity index 58%
copy from experimental/SkiaExamples/SkExampleNSView.mm
copy to example/mac/HelloWorldNSView.mm
index f014fa31c9d42cce79188142ae0a31c09c88901f..dcc82e34dcdf99d42404f26474f6fdb4cd449975 100644
--- a/experimental/SkiaExamples/SkExampleNSView.mm
+++ b/example/mac/HelloWorldNSView.mm
@@ -1,17 +1,16 @@
-//
-//  SkExampleNSView.m
-//  SkiaExamples
-//
-//  Created by Sergio González on 6/11/13.
-//
-//
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
 
-#import "SkExampleNSView.h"
+#import "HelloWorldNSView.h"
 
 #include "SkApplication.h"
 #include <crt_externs.h>  
 
-@implementation SkExampleNSView
+@implementation HelloWorldNSView
 
 - (id)initWithDefaults {
     if ((self = [super initWithDefaults])) {