title: Adding headers to framework for release
body: <p>I'm building a framework project in XCode and everything builds and looks great except there is no <code>Headers</code> directory in the built <code>Foo.framework</code>.</p>
  
  <p>Do I have to add an explicit build phase for this or is there just a setting to which I'm oblivious? <code>PUBLIC_HEADERS_FOLDER_PATH</code> looks promising, but I'm not sure how to use it.</p>