#2 Slots don't know their own names

[Tripp Lilley]

In order to conserve space, I neglected to let slots know their own name(s). I need to either add a find-name function that will probe the dict and discover the name of the slot (would have to look in parents, too), or start storing the slot name with the slot (space-hog, and I'm not sure how often code will need the name).

Another alternative would be to add a flag to setattr such that code that needed the slot name could be explicitly added with the slot name. That might be the best compromise. It would, of course, need to carry that flag across object->object copies, so that it would always know what slot name it was in if it originally requested such knowledge. Think about this.