MTL reader cannot parse string value property

Current implementation assumes every mtl property is either integer, float, or array of float. This prevents the parser from getting texture filename from map_Kd, map_Ks, etc.

https://github.com/ratcave/wavefront_reader/blob/c515164a3952d6b85f8044f429406fddd862bfd0/wavefront_reader/reading.py#L83-L93

This should be fixed as

 elif materials: 
     if data: 
         split_data = data.strip().split(' ') 

         if len(split_data) > 1: 
             material[prefix] = tuple(float(d) for d in split_data) 
         else: 
             try: 
                 material[prefix] = int(data) 
             except ValueError:
                 try:
                     material[prefix] = float(data) 
                 except ValueError:
                     material[prefix] = data  # accept string value

This is also a direct solution to #1

ratcave / wavefront_reader

MTL reader cannot parse string value property #5