Note: this is an old commit that was relevant prior to 10b413c
("Add asset preloading system for IC message rendering")

WebAO assumes every character has an idle and talking animations which
reside in fixed "(a)" and "(b)" subdirectories. This assumption, of
course, breaks many valid characters that don't use these magical
directory names, as it prepends them to every emote URL.

This commit removes this fossil. Animation, or any character structure
at all, shouldn't depend on magical subdirectory names, and instead
defined explicitly.