Fixed launch crash on iOS 7.0 by checking if current device supports the uniqueIdentifier property.
Fixed launch crash on iOS 7.0 by checking if current device supports the uniqueIdentifier property.

themonki/onebusaway-iphone,aaronbrethorst/onebusaway-iphone,cathy810218/onebusaway-iphone,cathy810218/onebusaway-iphone,bbodenmiller/onebusaway-iphone,OneBusAway/onebusaway-iphone,OneBusAway/onebusaway-iphone,tomtclai/onebusaway-iphone,bbodenmiller/onebusaway-iphone,chadsy/onebusaway-iphone,cathy810218/onebusaway-iphone,cathy810218/onebusaway-iphone,themonki/onebusaway-iphone,ualch9/onebusaway-iphone,aaronbrethorst/onebusaway-iphone,tomtclai/onebusaway-iphone,OneBusAway/onebusaway-iphone,ualch9/onebusaway-iphone,whip112/onebusaway-iphone,syoung-smallwisdom/onebusaway-iphone,ualch9/onebusaway-iphone,chadsy/onebusaway-iphone,chadsy/onebusaway-iphone,ualch9/onebusaway-iphone,themonki/onebusaway-iphone,chadsy/onebusaway-iphone,bbodenmiller/onebusaway-iphone,ualch9/onebusaway-iphone,OneBusAway/onebusaway-iphone,syoung-smallwisdom/onebusaway-iphone,themonki/onebusaway-iphone,syoung-smallwisdom/onebusaway-iphone,aaronbrethorst/onebusaway-iphone,whip112/onebusaway-iphone,bbodenmiller/onebusaway-iphone,syoung-smallwisdom/onebusaway-iphone,whip112/onebusaway-iphone,whip112/onebusaway-iphone,OneBusAway/onebusaway-iphone,themonki/onebusaway-iphone,tomtclai/onebusaway-iphone,aaronbrethorst/onebusaway-iphone