Changed id to instancetype
Changed id to instancetype

dilumn/AFNetworking,kiurentu/AFNetworking,jeremiahyan/AFNetworking,michal-olszewski/AFNetworking-CustomCallbacks,wangxiaoxiang/AFNetworking,dake/AFNetworking,BohemianCoding/AFNetworking,OmarPedraza/AFNetworking,kiurentu/AFNetworking,NextThought/AFNetworking,kevin-zqw/AFNetworking,donholly/AFNetworking,michal-olszewski/AFNetworking-CustomCallbacks