title: Resource files in subdirectory are copied to root directory of the app bundle
body: <p>I am not sure whether this is expected or it is bug. 
  I am trying to create the same folder structure in disk as that in XCode. I use the following steps to add resource files to my project:</p>
  
  <ol>
  <li>Create a <code>Resources</code> folder under the root folder of the project.</li>
  <li>Drag the <code>Resources</code> folder to XCode, which creates a <code>Group</code> for the folder.</li>
  <li>Drag my resource files from <code>Finder</code> to the <code>Resources</code> folder in XCode.</li>
  </ol>
  
  <p>And now I can see all the resource files are listed in <code>Build Phrases</code>-><code>Copy Bundle Resources</code>.</p>
  
  <p>The weird thing is that <code>[[NSBundle mainBundle] pathForResource:@"book" ofType:@"epub"]</code> returns a file path that can be located, while <code>[[NSBundle mainBundle] pathForResource:@"book" ofType:@"epub" inDirectory:@"Resources"]</code> returns <code>(null)</code>.</p>
  
  <p>From the <code>Build Results</code> window, I notice this line:</p>
  
  <pre><code>CpResource MBookReader/Resources/book.epub /Users/neevek/Library/Developer/Xcode/DerivedData/workspace-fykuaikryknuhxgevcdtspkspptj/Build/Products/Debug-iphonesimulator/MBookReader.app/book.epub
  cd /Users/neevek/workspace/xcode_projects/MBookReader
  setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
  builtin-copy -exclude .DS_Store -exclude CVS -exclude .svn -exclude .git -exclude .hg -resolve-src-symlinks -strip-tool /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/strip /Users/neevek/workspace/xcode_projects/MBookReader/MBookReader/Resources/book.epub /Users/neevek/Library/Developer/Xcode/DerivedData/workspace-fykuaikryknuhxgevcdtspkspptj/Build/Products/Debug-iphonesimulator/MBookReader.app
  </code></pre>
  
  <p>which shows that <code>Resources/book.epub</code> file is indeed copied to <code>MBookReader.app/</code>(the root directory of the app bundle). </p>
  
  <p>Now <code>Resources</code> is a real folder in disk, why the folder itself is not copied?</p>
  
  <p>PS. I am using XCode 4.3.2.</p>