Log Message:
Update to 1.3.3. From the changelog:

Jan  16 2003:
    - Yet more code cleanup. Added a write_cksum_rio internal routine.
    - Fixed a major typeo in complete_upload_rio. Uploads should work again.
Jan  13 2003:
    - Further code cleanup
    - S-Series should no longer bomb out on RIO_PREFR command
Jan  09 2003:
    - Code cleanup, removed all compatability for recognizing old hack (sorry)
    - (Library) added function for uploading from pipe (needs testing)
    - (Frontend) added support for uploading from stdin (needs testing)
Jan  08 2003:
     These updates correspond to v1.3.1 (currently in CVS):
    - Updated the version to somthing a little easier to follow
    - Minor fixes
    - Mixed results comming in about using rioutil with the S-Series,
     but in general the reports are positive :)
    - Eliminated support to recognize old hack (it was causing wierd problems)
     Other Changes:
    - Updated README
    - Release source to rioutil Firmware Updater
Dec  19 2002:
    - Completly changed the downloadable song hack:
      - Any file can be downloaded (regardless of what sf was used to ul it)
      - Any song that is downloaded will be removed as well.
      - No more weird numbering!
    - General fixes/changes