Fixed analyzer warning in AsyncUdpSocket.m

Fixed analyzer's 'possible leak' warning in -[AsyncUdpSocket
doReceive:] by using an NSData local variable instead of
theCurrentReceive->buffer to do the test of whether'buf' needs to be
freed.
Bug fix for issue #146 - GCDAsyncSocket doesn't dealloc properly without disconnect call.
Bug fix for issue #102 - Stack overflow while writing data. Also addresses issue #115 & issue #216. Thanks to teerapap for the patch. (it's being used with the addition of an autoreleasepool)
Merge pull request #191 from karnevil9/master

Fixed analyzer warning in AsyncUdpSocket.m
Upgrading a few projects to latest Xcode recommended settings
Bug fix for issue #223 - Logging is hardcoded to off, so enabling it requires forking the repo
Merge branch 'master' of github.com:robbiehanson/CocoaAsyncSocket
Updated podspec to 7.3.5