OBJ file loading misses color handling

The OBJ file format supports color; example file:

####
#
# OBJ File Generated by Meshlab
#
####
# Object color.obj
#
# Vertices: 6
# Faces: 8
#
####
vn 1.000000 0.000000 0.000000
v 1.000000 0.000000 0.000000 0.678431 0.509804 0.600000
vn 0.000000 1.000000 0.000000
v 0.000000 1.000000 0.000000 0.905882 0.149020 0.654902
vn 0.000000 0.000000 1.000000
v 0.000000 0.000000 1.000000 1.000000 0.019608 0.792157
vn -1.000000 0.000000 0.000000
v -1.000000 0.000000 0.000000 0.188235 0.117647 0.737255
vn 0.000000 -1.000000 0.000000
v 0.000000 -1.000000 0.000000 0.298039 0.243137 0.776471
vn 0.000000 0.000000 -1.000000
v 0.000000 0.000000 -1.000000 0.019608 0.517647 0.439216
#6 vertices, 0 vertices normals

f 1//1 2//2 3//3
f 1//1 3//3 5//5
f 1//1 5//5 6//6
f 1//1 6//6 2//2
f 4//4 2//2 6//6
f 4//4 6//6 5//5
f 4//4 5//5 3//3
f 4//4 3//3 2//2
#8 faces, 0 coords texture

# End of File

loadOBJFile and loadPolygonFileOBJ don't handle color information.

Locate the implementations of loadOBJFile and loadPolygonFileOBJ and inspect how vertex records from the supplied OBJ example are parsed. Trace the loaded point data to determine where vertex colors should be retained, then verify that loading the example preserves its six vertex colors and that existing OBJ loading behavior remains intact.