Support app extensions
Support app extensions

RACCommunity/Rex,bjarkehs/Rex,RACCommunity/Rex,calebd/ReactiveCocoa,ohwutup/ReactiveCocoa,nanoxd/Rex,walkingsmarts/ReactiveCocoa,walkingsmarts/ReactiveCocoa,ikesyo/Rex,skyylex/Rex,ikesyo/Rex,neilpa/Rex,bjarkehs/Rex,RACCommunity/Rex,neilpa/Rex,walkingsmarts/ReactiveCocoa,avalanched/Rex,nanoxd/Rex,ohwutup/ReactiveCocoa,ohwutup/ReactiveCocoa,calebd/ReactiveCocoa,calebd/ReactiveCocoa