Remove instance logic for BinaryStorage and JsonStorage, part 2

1. part of #389
2. file rename
3. fixup

Wox/Storage/UserSelectedRecord.cs

@@ -0,0 +1,34 @@
+using System.Collections.Generic;
+using Newtonsoft.Json;
+using Wox.Infrastructure.Storage;
+using Wox.Plugin;
+
+namespace Wox.Storage
+{
+    public class UserSelectedRecord
+    {
+        [JsonProperty]
+        private Dictionary<string, int> records = new Dictionary<string, int>();
+
+        public void Add(Result result)
+        {
+            if (records.ContainsKey(result.ToString()))
+            {
+                records[result.ToString()] += 1;
+            }
+            else
+            {
+                records.Add(result.ToString(), 1);
+            }
+        }
+
+        public int GetSelectedCount(Result result)
+        {
+            if (records.ContainsKey(result.ToString()))
+            {
+                return records[result.ToString()];
+            }
+            return 0;
+        }
+    }
+}