Contributed by MAEDA, Go

Contributed by Artem Naluzhnyy

Some models (Changeset) require custom options passed to
acts_as_activity_provider but acts_as_journalized wasn't accepting these
for :timestamp or :author_key

This will let them pick up the committer string if user is nil

Was due to Journals touching the parent record but the Journal
not having it's STI class correct during the type update.

Contributed by Artem Naluzhnyy.

Contributed by Artem Naluzhnyy.

Contributed by Artem Naluzhnyy.

Getting rid of "rake/rdoctask is deprecated." warning. #477

works with all rdoc versions since 2.4.2
see https://github.com/rdoc/rdoc/blob/master/History.txt

https://www.chiliproject.org/projects/chiliproject/wiki/HowTo_Release

Conflicts:
	test/unit/journal_test.rb

Multiple records were found and postgres was returning them in a different
order than what the test assumed.

So the initial journal would have the changes from an Object#new
to the created version of the Object. Also includes a change to the
database migration in order to create these initial journals for
all journaled Objects.