I'd like to update the use cases with this in mind:
* Create a separate reviewer role
* A reviewer may have an alias which is different from his name so he
can act anonymously but still is traceable
* An additional use case adding reviewers to a submitted article
* Create an editor role
* Make the use case of adding reviewers available only to the editor
* Limit the availability of review activities to the respective
reviewers
* Add an object type of review results which is created by a reviewer
* Add a use case entering a review result
* Add a use case of viewing review results which initially is
available only, the reviewer and the editor
* Add a use case where the review results are approved by the editor
and then are available to the author of the article