move HelloWorld to be a peer of SampleApp

example/mac/HelloWorld.xib

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@@ skipping 24 matching lines @@
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-                                <string key="NSClassName">SampleAppDelegate</string>
+                                <string key="NSClassName">HelloWorldDelegate</string>
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                                 <string key="NSWindowRect">{{335, 288}, {640, 480}}</string>
                                 <int key="NSWTFlags">1417150464</int>
-                                <string key="NSWindowTitle">Skia Examples</string>
+                                <string key="NSWindowTitle">Hello World</string>
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                                 <nil key="NSUserInterfaceItemIdentifier"/>
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                                         <reference key="NSWindow"/>
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@@ skipping 2241 matching lines @@
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                                                 <string key="label">toggle:</string>
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-                                                <string key="label">toggleKeyEquivalents:</string>
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                                 <integer value="1" key="371.NSWindowTemplate.visibleAtLaunch"/>
-                                <string key="372.CustomClassName">SkExampleNSView</string>
+                                <string key="372.CustomClassName">HelloWorldNSView</string>
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@@ skipping 64 matching lines @@
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-                                <string key="637.CustomClassName">SkTextFieldCell</string>
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                                 <object class="IBPartialClassDescription">
-                                        <string key="className">SampleAppDelegate</string>
+                                        <string key="className">HelloWorldDelegate</string>
                                         <string key="superclassName">NSObject</string>
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                                                 <string key="NS.key.0">toiPadSize:</string>
                                                 <string key="NS.object.0">id</string>
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                                                         <string key="name">toiPadSize:</string>
                                                         <string key="candidateClassName">id</string>
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-                                                <string key="fOptions">SkOptionsTableView</string>
                                                 <string key="fView">SkSampleNSView</string>
                                                 <string key="fWindow">NSWindow</string>
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-                                                <object class="IBToOneOutletInfo" key="fOptions">
-                                                        <string key="name">fOptions</string>
-                                                        <string key="candidateClassName">SkOptionsTableView</string>
-                                                </object>
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                                                         <string key="name">fView</string>
                                                         <string key="candidateClassName">SkSampleNSView</string>
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                                                 <string key="majorKey">IBProjectSource</string>
-                                                <string key="minorKey">./Classes/SampleAppDelegate.h</string>
+                                                <string key="minorKey">./Classes/HelloWorldDelegate.h</string>
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                                 <object class="IBPartialClassDescription">
-                                        <string key="className">SkExampleNSView</string>
+                                        <string key="className">HelloWorldNSView</string>
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                                                 <string key="majorKey">IBProjectSource</string>
-                                                <string key="minorKey">./Classes/SkExampleNSView.h</string>
+                                                <string key="minorKey">./Classes/HelloWorldNSView.h</string>
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