Summary of changes from version 1.5 to version 1.6:

- MCI driver added

- manual frame rate control added

- arbitrary scaling of window content supported (WinG only)

- 'seek to frame' feature added (for MCI)

- video format can now be reconfigured without having to
  restart playback

- minor video speed improvements

- audio decoder speed improved

- synchronization now really uses audio and video timestamps
  (PTS/DTS) instead of assuming nominal speed and identical
  start time for video and audio

- reduced memory requirements (by using much smaller IDCT tables)

- modified inverse quantizer for improved image quality

- program restructured as frontend + DLL (to simplify MCI support)

- structural changes for efficient DCI support

- fixed bug in decoding of very large IDCT coefficients which
  caused visible artifacts in some streams

- no longer diplays an error message when WinG (or DCI) is not installed

- no longer activates the program manager when quitting

- fixed bugs in end of file detection (which caused some sequences to
  loop)

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