acts_as_journalized called changes as per ActiveRecord::Dirty 
(see http://ar.rubyonrails.org/classes/ActiveRecord/Dirty.html#M000291), 
the journalized model Changeset :has_many changes though, which 
made the call return a list of associated objects instead of the 
intended list of changed attributes. Replaced changes with the code
from AR::Dirty to work around that.

http://www.flickr.com/photos/thebrownhouse/4599233853/sizes/l/

Database detection library. #112

This module can be used to gather information about the currently used
database.

Fix test errors on 1.8.6 after acts_as_journalized merge. #413

Fix test errors on 1.9.2 after acts_as_journalized merge. #412

Remove returning since it causes deprecation warnings. #414

Conflicts:
	test/unit/journal_test.rb
	vendor/plugins/acts_as_journalized/lib/redmine/acts/journalized/permissions.rb