2.0.0-beta.3

• Parseable protocol was rewritten to directly inherit from Alamofire.DataResponseSerializerProtocol. It allows us to have two generic typealiases - SerializedObject from Alamofire and added to it SerializedError from TRON.
• Fixed issue, that could cause completion handlers to be called on background thread.
• Use SwiftyJSON instead of forked SwiftyJSON3
• parameters property on BaseRequest now contains [String:Any] instead of [String:AnyObject]
• processingQueue property on APIRequest was removed.