Map 3D importer freezes

[Deijin27]

The reason this happens is if your material names are too long. Maya obj exporter adds prefix of obj name to the materials for some reason.

Solution for users:

• Find and replace the mtl and obj files to remove the "MAP00_00:" prefixes so it's just the name again.

Changes to make to ranseilink:

• Check the material names to make sure they're not too long so it errors before getting to the infinite loop, and provides a useful error message
• Auto-remove the prefix of "\<mapName>:" from all names.