- updated 2.67 news a bit
- set data_len = -1 in export_brick() to force text mode
- pass -1 to gwy_save_auxiliary_data as the length even if we know it to force
- use gwy_convert_raw_data()
- use gwy_convert_raw_data()
- use gwy_convert_raw_data()
- use gwy_convert_raw_data()
- updated gwy_raw_data_size() for the new types