create atoms if they're not there already
create atoms if they're not there already

darcs-hash:20080719150045-a887e-a82b80b0ddd5976ddd3d1a57084b24d5c2a3eb49.gz

RaphaelRochet/easystroke,thjaeger/easystroke,thjaeger/easystroke,RaphaelRochet/easystroke