Added EPUB plugin

QuickLook.Plugin/VersOne.Epub/RefEntities/EpubChapterRef.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace VersOne.Epub
+{
+    public class EpubChapterRef
+    {
+        private readonly EpubTextContentFileRef epubTextContentFileRef;        
+
+        public EpubChapterRef(EpubTextContentFileRef epubTextContentFileRef)
+        {
+            this.epubTextContentFileRef = epubTextContentFileRef;
+        }
+
+        public string Title { get; set; }
+        public string ContentFileName { get; set; }
+        public string Anchor { get; set; }
+        public List<EpubChapterRef> SubChapters { get; set; }
+        public EpubChapterRef Parent { get; set; }
+
+        public string ReadHtmlContent()
+        {
+            return ReadHtmlContentAsync().Result;
+        }
+
+        public Task<string> ReadHtmlContentAsync()
+        {
+            return epubTextContentFileRef.ReadContentAsTextAsync();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("Title: {0}, Subchapter count: {1}", Title, SubChapters.Count);
+        }
+    }
+}