title: What does the "Use for Development" button in Xcode Organizer do to an iOS device?
body: <p>When selecting an iOS device and clicking the "Use for Development" button in Xcode organizer, what does it change on the device (iPhone or iPad)?</p>
  
  <p>Are there any debugging symbols installed or some sort of profilers or loggers?</p>
  
  <p>Does this mode affect device performance or battery life while being "used for development"?</p>