AFNetworking/AFNetworking — pull request #1019 by kylef (2013-05-22 13:43:01+00:00)
Title: [AFHTTPClient init] should raise an exception

As discussed on #971, this will prevent anyone from accidentally calling init
which results in undefined behaviour.

http://developer.apple.com/library/ios/#documentation/general/conceptual/devpedia-cocoacore/MultipleInitializers.html