Support running on iOS 4.x-5.1 (as well as 6.x)
Support running on iOS 4.x-5.1 (as well as 6.x)

 - Set deployment target to 4.3
 - Avoids using _objc_setProperty_nonatomic_copy which isn't
   available at runtime in iOS < 6.0

tjarratt/cedar,jeffh/cedar,irfanah/cedar,hsienchiaolee/cedar,idoru/cedar,irfanah/cedar,pivotal/cedar,jeffh/cedar,idoru/cedar,jeffh/cedar,jasperblues/cedar,hsienchiaolee/cedar,jasperblues/cedar,jeffh/cedar,tjarratt/cedar,briancroom/cedar,hsienchiaolee/cedar,tjarratt/cedar,pivotal/cedar,jasperblues/cedar,briancroom/cedar,briancroom/cedar,hsienchiaolee/cedar,pivotal/cedar,idoru/cedar,irfanah/cedar,jeffh/cedar,jasperblues/cedar,briancroom/cedar,pivotal/cedar,irfanah/cedar,tjarratt/cedar,briancroom/cedar,pivotal/cedar,tjarratt/cedar,idoru/cedar,idoru/cedar