iVariable/Backbone.actAs.Mementoable — pull request #5 by Anks (2012-05-21 12:57:33+00:00)
Title: Adding a `diffKeys` function to mementos...

...that returns a single array containing attributes names that have been added/removed/deleted.

Sending a separate pull request for this feature, as it's something I want for my app, but you may not want to include it in the main repo.