9/29/01 backup

A greater number of smaller features in this one. Vertical development on Cinelerra is 75% complete with more energy expected to go into horizontal development and debugging as soon as vertical expansion reaches the original end stage set 15 months ago. The only vertical expansion from this point is probably plugin and transition features. The one weirdo who uses Cinelerra to generate mp3's on 150 node clusters should use the latest backup.