Instructions to make onion.png, the hex sticker for the onion package.

File onion.svg is the inkscape source file containing the artwork.
Import this in to gimp and merge with a layer of colour 7733FF to
create onion_blue.png (not under version control).

In R, source onion_stickermaker.R to create onion.png, the hex
sticker.  This imports file onion_blue.png.  File onion.png lives in
the man/figures directory of the onion package, and it is under
version control.
