title: Force genstrings to build the Localizable.strings file in order of appearance rather than alphabetically
body: <p>I'm new to internationalization and localization for iOS.  I'm running genstrings:
  <code>find . -name \*.m | xargs genstrings -o en.lproj</code> to generate my Localizable.strings files.  It builds the file in alphabetical order (by key).</p>
  
  <p>For ease of translation I'd prefer that the keys and values be ordered by their order of appearance in the .m files.  Is this possible with genstrings?  I couldn't find the relevant info on its <code>man</code> page.</p>