title: Using locale settings to detect wheter to use imperial units
body: <p>I'm working on an app that wants to display lengths either in centimeters (cm) or in inches("). Is there a way to select the right unit from the locale? In any event I'm also going to put in an option so that the user can to override the locale setting.</p>
  
  <p>USA, Liberia, and Burma should use imperial units and the rest of the world normal units. One way is to put in this logic in my own classes, but I would prefer using any built in logic if available. Any pointers?</p>