implement something more similar to original "line art"

[kylemcdonald]

the ideal solution is to write some code that:

1. creates a map from all the edges to all the faces they belong to
2. removes any edges that have any/only coplanar faces

this could be "has any coplanar faces" or "has only coplanar faces", as they will respond differently when (for example) two cubes are next to each other. "has only" should be the default.