acts_as_audited ChangeLog
-------------------------------------------------------------------------------

* 2008-03-21 - added #changed_attributes to get access to the changes before a
               save [Chris Parker]
* 2007-12-16 - Added #revision_at for retrieving a revision from a specific
               time [Jacob Atzen]
* 2007-12-16 - Fix error when getting revision from audit with no changes
               [Geoffrey Wiseman]
* 2007-12-16 - Remove dependency on acts_as_list
* 2007-06-17 - Added support getting previous revisions
* 2006-11-17 - Replaced use of singleton User.current_user with cache sweeper
               implementation for auditing the user that made the change
* 2006-11-17 - added migration generator
* 2006-08-14 - incorporated changes from Michael Schuerig to write_attribute
               that saves the new value after every change and not just the
               first, and performs proper type-casting before doing comparisons
* 2006-08-14 - The "changes" are now saved as a serialized hash
* 2006-07-21 - initial version