Update worthwhile gem

Includes Mike Giarlo's addition which adds GenericFile as
a concern to ease downstream overrides.
Add format_review datastream to WorthWhile::GenericFile

As gisted by Mike Giarlo:
https://gist.github.com/mjgiarlo/9a06338721de32d6c68a#file-generic_file-rb
Fix error with sufia initializer

Apparently this resulted from an update to how they do logging.
Prefer instance methods to class methods
Describe new interface for depositor

Implement half of the mock too.
Clarify the responsibilities of Depositor and Submission
WIP: Ensure submission and fedora object metadata are in sync