Changes in version 1.1                         

  - Added argument db_version to get_Oz_butterflies to allow retrieval
    of older versions of the database. Versions 1 to 3 included raw
    image files in Sony raw form (.ARW), while version 4 stores raw
    image files in Digital Negative (.DNG) format.

                         Changes in version 1.0                         

  - First public release