ComicInfo Refactor (#636)

* Implemented methods to parse out the whole ComicInfo file and a mock ComicInfo from epub files.

* Removed unused imports. ScanSeries needs to cleanup deleted chapters and call RefreshMetadata. Ensure after scan we cleanup tags without any series.

* Random cleanup

* Added some comments about data getting stale and not updating.

* Removed old Summary methods in favor of the ComicInfo versions

* Added a missing property

* Fixed unit test

API/Data/Repositories/ChapterRepository.cs

@@ -1,7 +1,5 @@
 using System.Collections.Generic;
-using System.IO;
 using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using API.DTOs;
 using API.DTOs.Reader;