fix two issues with OBJImporter
If the obj included a full path to a png file the importer would report errors trying to find it.
The OBJToVTP example was not autoinit for OpenGL2 so no rendering was happening.
If the obj included a full path to a png file the importer would report errors trying to find it.
The OBJToVTP example was not autoinit for OpenGL2 so no rendering was happening.