title: Titanium Mobile: set locale (language) in app
body: <p>I don't quite get how the user locale is handled in Titanium Mobile.
  I have now set up two language files, and at least the English version is working fine. Now I would like to be able to set the locale within the app, so a user may change the language of the app.</p>
  
  <p>How is this done?
  And what is the best way to handle other locale issues such as currency, date formatting, etc.?</p>
  
  <p>Thanks you for your answers!
  Cheers
  Chris</p>