LH :: Ported fix over to github. Fixed event handler methods that do not...

WDS, A Xerox company is currently using datasift-ruby gem 2.1.0 but as there are some issues with the event handlers e.g. onDeleted, onError, onWarning etc. , we are not able to debug or get the necessary information in our logs if these are called. We added some puts statements to prevent errors and also log down errors and warnings.