Add pull request #1643 to changelog.
Add pull request #1643 to changelog.

ashfurrow/CocoaPods,segiddins/CocoaPods,orta/CocoaPods,mglidden/CocoaPods,mglidden/CocoaPods,Ashton-W/CocoaPods,mglidden/CocoaPods,vivekshukla-mob-ibtech/Repository