Bicubic Interpolation Patch
-----------------------------------------
author: Lutz-Peter Hooge <lpvader@gmx.de>

This patch, based on MegaPOV 1.0 (http://megapov.inetart.net/)
adds bicubic interpolation to imagemaps.

To use bicubic interpolation, use 
image_map{
 [...]
 interpolation 3
}

included files:
src: sources files changed from MegaPOV 1.0

