pbz

Thanks. What do you think about the parameter order? Matches well with `circles_add`, but clashes with `cutouts`. Trying to use both kinda makes my head hurt.

Complex box support is already included:  ``` include ; thickness = 3.1; unit = 70; die_one = [ [unit/14, unit/14, unit*7/14-thickness/2, unit*7/14-thickness/2] ]; die_two = [ [unit/14, unit/14, unit*3/14-thickness/2,...