Undo in Django

I want to build an app where changes to certain objects would be undoable and redoable. The idea is to have those objects managed in a wiki-like way: any visitor can make a change but there is a permanent change history and anyone can reverse anyone else's actions. I am thinking of doing it with

Re: problems importing an app

Yes, this took care of it. Thanks. I guess I should have read the documentation more carefully, since it does say I needed to cd to myproject/apps before creating an app. Just as a suggestion, however, it might be useful to mark visually more clearly in the text the actual steps that the user ne