#5 .obj import: load textures as procedurals

[Marc]

Since AoI's procedurals are the most customizable form
of texture it offers, I'd like to have imported .obj
files load their image textures not as image-mapped
textures but as 2D Procedural textures. Today another
user reminded me of this when he asked how he could
scale an imported .obj's image-mapped texture's
emissive channel beyond 1.0, which I think is only
possible with a procedural. This is only one advantage
of such a scheme.