Allow Edge Color to be Set

[jmwright]

This is a spin-off issue from #557 and the relevant part of that issue is copied below.

The request is to have show_object respect the color setting for edges.

Here is the current behavior:

from cadquery.func import *

show_object(box(1, 1, 1), options={"color": "blue"})
show_object(segment((1, 0), (1, 5)), options={"color": "blue"})

show_object(box(1, 1, 1).moved(x=3))
show_object(segment((1, 0), (1, 5)).moved(x=3))

Color is applied to faces. Default edge color is black except for standalone edges.

CC: @lorenzncode

[lorenzncode]

Thanks @jmwright. I'd suggest edge color to be handled by a separate option. In the example above, the edges of the blue box would remain black unless say "edgecolor" is also specified. cadquery.vis provides separate control for edge color.

from cadquery.func import *
from cadquery.vis import * 

show(style( box(1, 1, 1), color="blue", edgecolor="white"))