title: Beacon getDistance() Units of measurement and calculation methods
body: <p>I've started to use the <code>Android Beacon Library</code> from <code>RadiusNetwork</code>. After some try, i've reached the result to display my iBeacon data on <code>Nexus 5</code>.
  The questions are:</p>
  
  <p>The distance are in meters or in some other units?
  I've seen that there is an algorithm based upon the power and the rssi, there is a way to improve the precision of the function <strong>beacon.getDistance()</strong>?</p>