This will allow the Journaled object to reliability set the fields on the Journal
without calling init_journal (which is a before_save hook and shouldn't be called
directly).

Conflicts:
	doc/CHANGELOG.rdoc
	lib/redmine/version.rb

This will cause the class to run acts_as_journal which will create the
Journal sub-classes and prevent uninitialized constants since the sub-classes
are created on the fly.

If the Journal or the Journaled object don't save successfully,
put out the reasons why instead of aborting the migrations. Journaled
objects might failure from the :touch update, which are safe to ignore.