Using now SwiftyJSON instead of json-swift
- Rewritten the ROJSONObject to use internally
- Adapted Data classes (Because of a Generics bug, we need to use additional instance methods)
- Further Info to the Generics problem http://stackoverflow.com/questions/26280176/swift-generics-not-preserving-type
Fix issues with XCode 6.1
Fix XCode 6.1 issues