Loading assimp

[Dlearner via Digitalmars-d-learn]

Need to rez this thread because I ran into a wall.  Two little 
things:

1) Can't seem to get the Importer class to work ("undefined 
identifier 'Importer' ", etc), and
2) GetTexture and GetTextureCount for aiMaterial don't seem to 
work
(source\model.d(105,28): Error: no property 'GetTextureCount' for 
type 'aiMaterial*'
source\model.d(107,6): Error: no property 'GetTexture' for type 
'aiMaterial*')

There are some const issues, too, but I can hack around them.  
Does anyone have any experience with these?