Frontend widget to display revisions to visitors

[stevejburge]

Related to #13 but different

How about a widget to show past revisions too, similar a Wikipedia page history

[stevejburge]

Hi, I am looking for a plugin the allows me to show previous versions of my posts to the front-end users. It's not something for admins, but for users who read our posts and want to see the previous versions of the same post.