Coplanar detection fails on simple cubes

[osresearch]

rotate([30,-10,0])
translate([5,-5,0])
cube([10,10,10], center=true);

rotate([0,30,-10])
translate([5,0,0])
cube([10,10,10], center=true);

[osresearch]

Looks like eps in close_enough() might be too strict. Relaxing it to 0.001 results in a much better image.