[Issue #278] Adding thread safety to incrementing / decrementing and display of network activity indicator
[Issue #278] Adding thread safety to incrementing / decrementing and display of network activity indicator

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obileMirrors/AFNetworking,iKorich/AFNetworking,houweilei/AFNetworking,harlanhaskins/AFNetworking,rafaelvg/AFNetworking,HiTask/AFNetworking,shwetsolanki/AFNetworking,Kevin775263419/AFNetworking,mekentosj/AFNetworking,simX/AFNetworking,HappySnowFish/AFNetworking