bug fix: new_track() now returns the created instance
bug fix: new_track() now returns the created instance

buckket/PyRfK,krautradio/PyRfK,TeddyDesTodes/PyRfK,krautradio/PyRfK,buckket/PyRfK,krautradio/PyRfK,buckket/weltklang,buckket/weltklang,TeddyDesTodes/PyRfK,krautradio/PyRfK,buckket/PyRfK,TeddyDesTodes/PyRfK,buckket/weltklang,buckket/weltklang