python: add Itdb_Device::timezone_shift to the binding
python: add Itdb_Device::timezone_shift to the binding

This is done by including device->timezone_shift in sw_ipod_device_to_dict()

neuschaefer/libgpod,neuschaefer/libgpod,neuschaefer/libgpod,hyperair/libgpod,hyperair/libgpod,hyperair/libgpod,hyperair/libgpod,hyperair/libgpod,neuschaefer/libgpod,neuschaefer/libgpod