Included epub library in plugin project

QuickLook.Plugin/QuickLook.Plugin.EpubViewer/EpubReader/Utils/ZipPathUtils.cs

@@ -0,0 +1,32 @@
+using System;
+
+namespace VersOne.Epub.Internal
+{
+    internal static class ZipPathUtils
+    {
+        public static string GetDirectoryPath(string filePath)
+        {
+            int lastSlashIndex = filePath.LastIndexOf('/');
+            if (lastSlashIndex == -1)
+            {
+                return String.Empty;
+            }
+            else
+            {
+                return filePath.Substring(0, lastSlashIndex);
+            }
+        }
+
+        public static string Combine(string directory, string fileName)
+        {
+            if (String.IsNullOrEmpty(directory))
+            {
+                return fileName;
+            }
+            else
+            {
+                return String.Concat(directory, "/", fileName);
+            }
+        }
+    }
+}