Lots of changes to get code ready to add library.

API/DTOs/LibraryDto.cs

@@ -0,0 +1,13 @@
+using System.Collections.Generic;
+using API.Entities;
+
+namespace API.DTOs
+{
+    public class LibraryDto
+    {
+        public string Name { get; set; }
+        public string CoverImage { get; set; }
+        public LibraryType Type { get; set; }
+        public ICollection<string> Folders { get; set; }
+    }
+}