Mayo Conv doesn’t export IGES colors to OBJ/MTL

[SamuelTallet]

Hello,

First of all, thank you for this great project.

Issue

Here is a colored IGES file opened in Mayo.

When I export to OBJ format, from the Mayo 0.8.0 app, this IGES file, OBJ and MTL files are created and colors are preserved.

But if I do the same operation with the Mayo Conv CLI (ec5d7d7): only the OBJ file is created and colors are lost. Here is result.

PS: This IGES file can be downloaded here.