The PNG files in this directory are generated on the first run and are not
under the GPL.

stickman.png
  From xkcd #149 "Sandwich" by Randall Munroe, https://xkcd.com/149/
  License: CC BY-NC 2.5, https://creativecommons.org/licenses/by-nc/2.5/
  Changes: cropped to the figure on the right; white background made transparent.

man*.png, girl*.png
  Generated from stickman.png by tools/make_walkers.py (same CC BY-NC 2.5).
  Changes: new walking legs drawn; a bow added to the girl.
