Description: Takes one strip as input and changes colors over time.  
Description: experiment with it. 
Description: Set it's ipo to a constant value to achieve some kind of "invert
Description: effect".  (not tested with fields)
Author: Stefan Gartner
Email: Stefan.Gartner@fhs-hagenberg.ac.at
Website:  http://orpheus.fhs-hagenberg.ac.at/students/mtd/mtd97047/
License: BSD