I can't believe it's more fixes! (#863)

* Send stack trace to the UI on prod mode

* Pdfs will now generate cover images. I missed something a few releases ago.

* Ignore @Recently-Snapshot directories for QNAP.

* Refactored Bitmap code to use ImageSharp so it's truly cross platform.

* Updated pdf extraction to use a multi-threaded approach to greatly speed up pdf image extraction

* Hooked in Characters tag from ComicInfo.xml

API/Services/ArchiveService.cs

@@ -346,6 +346,7 @@ namespace API.Services
                 info.Letterer = Parser.Parser.CleanAuthor(info.Letterer);
                 info.Penciller = Parser.Parser.CleanAuthor(info.Penciller);
                 info.Publisher = Parser.Parser.CleanAuthor(info.Publisher);
+                info.Characters = Parser.Parser.CleanAuthor(info.Characters);
 
                 if (!string.IsNullOrEmpty(info.Web))
                 {