title: @synthesize of 'weak' property is only allowed in ARC or GC mode with first compile of urbanship
body: <p>Basically, I have an IOS app that functioned without issue. </p>
  
  <p>While following the instructions at <a href="http://docs.urbanairship.com/build/ios.html#ios-push-getting-started">http://docs.urbanairship.com/build/ios.html#ios-push-getting-started</a>, I reached the "<a href="http://docs.urbanairship.com/build/ios.html#register-your-device">Register Your Device</a>" section asking me to compile.</p>
  
  <p>After attempting to build the code in xCode 5 I received the following error "@implementation UAPushSettingsAddTagViewController @synthesize of 'weak' property is only allowed in ARC or GC mode".</p>
  
  <p>Note:ARC mode is not in use.</p>