sort materials so we get predictable output from blender, also add option not to include dates in files.

Lower Delay will rise errors when rendering big images. 
My system Win7 64 (slow HD) reports following error on lower Delay: 
---
Reached EOF while decoding PNG
Cannot open input file
Cannot create backend data
Unknown fileformat
---

Maybe Delay should be bound to the imagesize. Or is there a better solution to wait for povray to finish the writing?

Thanks Campbell

Removed (commented out) Baking from the interface until we work on it again. More important issues need to be solved first. 

- original author of the script (aurel) will maintain it 

Changed texture scale factor to a better match. Not perfect yet, since user still has to correct scaling by offset.