02.07.2006
 * Seperate horizontal and vertical displacement
 * Wrap/smear edges

11.12.2004 
 * Cleaned up the code a bit

27.9.2003 
 * Fixed a bug that crashed blender when rendering larger images

13.4.2001 
 * Warp power can now be controlled with an IPO

10.4.2001
 * Default opacity is now 1. Warping near edges is drawn correctly

