Update how the position of flyers on the front window and the stairwell
are calculated, by Charlie's request. - Front window flyers and now spaced 2 feet back from the window. - Exterior stair edge flyers are now spaced 2 feet away from the stair. - Exterior stair edge flyers can now be placed along edge of platform. - Inner stair edge flyers can be placed along edge of platform. There is a bug in how the position of inner edge stair flyers are placed: the stair calculations are a bit off, such that the angles don't add up right. This means that on the upper stair, the flyers seem to hang from under, rather than the edge of, the stair. I'll look into it and fix it soon.