fixed memory leak and added TSL workaround for iOS 5.0 #98
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-renamed the block variable "self" to "webSocket" in several blocks to prevent confusion
-ensured references in blocks to self (and properties of self) properly reference the "webSocket" block variable to prevent retain loops
-added the TSL workaround for iOS 5.0 devices to properly connect on secure connections as described here https://developer.apple.com/library/ios/#technotes/tn2287/_index.html#//apple_ref/doc/uid/DTS40011309