Move some user settings to its own dll (cmd,folder plugin and etc)

Plugins/Wox.Plugin.Folder/FolderLink.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Linq;
+using Newtonsoft.Json;
+
+namespace Wox.Plugin.Folder
+{
+    [Serializable]
+    public class FolderLink
+    {
+        [JsonProperty]
+        public string Path { get; set; }
+
+        public string Nickname
+        {
+            get { return Path.Split(new char[] { System.IO.Path.DirectorySeparatorChar }, StringSplitOptions.None).Last(); }
+        }
+    }
+}