Refactored DB to be Series->Volumes->Chapters instead. All functionality that previously worked still works. Cleanup still needed.

API/Interfaces/IUnitOfWork.cs

@@ -7,6 +7,7 @@ namespace API.Interfaces
         ISeriesRepository SeriesRepository { get; }
         IUserRepository UserRepository { get; }
         ILibraryRepository LibraryRepository { get; }
+        IVolumeRepository VolumeRepository { get; }
         Task<bool> Complete();
         bool HasChanges();
     }