Material by Element - new buttons

Another update:

• fill slot: takes the mbe list using active material and for each material in list add a slot.
• clear slot: remove all material (even not mbe) and slots and keep only the first
• assign to polygons: works on single mesh's polygons.
• KAOS and NMATS have been moved to bpy.context.scene so you don't need to have a valide mbe material selected, and I've solved this way the startup issue.
• Change "kaos" algorythm due to my need... today I had to setup very little color variations so the new formula is:
• r+(random.randint(0,K)/1000) -> now you can use it between 1 and 999

link to download: http://dl.dropbox.com/u/30462810/scripts/material_by_element.py

Goin' forward with textures... stay tuned!

Pietro