[away3d] Broomstick OBJ MTL and Asset Library

[Choons]

Hi- I'm trying to get an OBJ and MTL working in Broomstick using the
new Asset Library approach but cannot get the mtl to load. I've tried
a couple of different obj models and their associated mtl files but no
go. Would some kind soul please enlighten me with a snippet of code on
loading up an obj/mtl model?