title: IOS Map user location not displayed
body: <p>I am experimenting with apple mapkit <a href="https://developer.apple.com/library/prerelease/content/documentation/UserExperience/Conceptual/LocationAwarenessPG/MapKit/MapKit.html#//apple_ref/doc/uid/TP40009497-CH3-SW1" rel="nofollow">apple mapkit guide</a>, and i noticed that to show the user location (blue dot), it suffice to set show userlocation to true in storyboard. I am testing on simulator (trying iphone 6 and 7) and i emulate locations using gpx files.</p>
  
  <p>My problem is no blue dot appears on screen. What can be wrong ?</p>