added support for url mapping and viitors

Oqtane.Server/Repository/Interfaces/IVisitorRepository.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using Oqtane.Models;
+
+namespace Oqtane.Repository
+{
+    public interface IVisitorRepository
+    {
+        IEnumerable<Visitor> GetVisitors(int siteId, DateTime fromDate);
+        Visitor AddVisitor(Visitor visitor);
+        Visitor UpdateVisitor(Visitor visitor);
+        Visitor GetVisitor(int visitorId);
+        void DeleteVisitor(int visitorId);
+    }
+}