major update to CLAN video

[Brian MacWhinney]

Dear Info-ChiBolts,
  Leonid has completed a major upgrading of the video CLAN facility for
Windows.  The system for video playback and transcription on Windows is now
working just as well as on the Mac and seems to be bug-free.  In addition,
we have added a few new editing functions and a bit more documentation to
the Help file, and improved a few key bindings.  If you are doing video
editing with CLAN on Windows, this version will work infinitely better than
earlier versions.

--Brian MacWhinney