Hi

When i embed "ears" in my model before printing, it's very hard to remove, because the printing lines aren't along the perimeter of the "real" object (especially if the bottom layer is rectilinear).

So i quickly created an option to create a brim only over "sharp" convex corners.

currently 2 new parameters:

• ear brim (boolean)
• max angle(float, default to 120)

I need to do a bit more work to improve the ordering of the printed gcode.

What do you think of it?
Shoud i do a pr?