added collection of figures to act as reminder that I want to fix the `o` loop rules eventually.
added collection of figures to act as reminder that I want to fix the `o` loop rules eventually.

(I need to generalize the input format first so that I can have a slew
of (chars,dirs) pairs associated with a *single* output rule; right
now I can merge all the chars and all the dirs but that looses the
coupling that you need to ensure e.g. that you do not connect a `/` to
a joint on its NW side.)

pnkfelix/mon-artiste