Fixes for Xcode 6 beta 6
Fixes for Xcode 6 beta 6

Lightstreamer/Lightstreamer-example-Chat-client-ios-swift,Weswit/Lightstreamer-example-Chat-client-ios-swift,Weswit/Lightstreamer-example-Chat-client-ios-swift,Lightstreamer/Lightstreamer-example-Chat-client-ios-swift