* Moved UpdateRelatedSeries from controller to SeriesService.cs
* Added 2 tests.
- UpdateRelatedSeries_ShouldDeletePrequelRelation
- UpdateRelatedSeries_ShouldNotAllowDuplicates
* Some docs and codestyle nitpicks
* Simplified tests and made easier to read
* Added 'Editions' series relation
* Missing code to properly show the relations in the UI
* Create Service for GetRelatedServices
* Added unit test. Assert Edition, Prequel and Sequel do not return parent while others do
* fixed missing userRating
* Add requested changes:
- Rename one test
- Split one test into two tests
7d65dc0530