Initial 1.1.3 Update

This still fairly early in development.  1.0.1 which is available on CocoaPods should be considered the stable version

1. Complete Transport Rewrite.
The rewrite takes a harder dependency on AFNetworking but greatly simplifies the code base
2. Begins integrating Changes to make the library consistent with the SignalR.Client45
https://github.com/SignalR/SignalR/compare/1.0.0...1.1.3

TODOs:
1. Handle Disconnect events at transport level
2. Review Transports changes and reflect those changes in objc