Removed NioTSO client and server

- NioTSO client isn't needed because we're using RayLib
- Added FreeSO's API server to handle most backend operations

server/FSO.Server.Database/DA/LotVisits/ILotVisits.cs

@@ -0,0 +1,66 @@
+using System;
+using System.Collections.Generic;
+
+namespace FSO.Server.Database.DA.LotVisitors
+{
+    public interface ILotVisits
+    {
+        /// <summary>
+        /// Records a new visit to a lot. A visit id is returned which can be used to record
+        /// when the visit ends
+        /// </summary>
+        /// <param name="avatar_id"></param>
+        /// <param name="visitor_type"></param>
+        /// <param name="lot_id"></param>
+        /// <returns></returns>
+        int? Visit(uint avatar_id, DbLotVisitorType visitor_type, int lot_id);
+
+        /// <summary>
+        /// Records that a visit has ended
+        /// </summary>
+        /// <param name="visit_id"></param>
+        void Leave(int visit_id);
+
+        /// <summary>
+        /// Updates the timestamp on active visits. This helps detect the difference between
+        /// a long visit and an error where the visit did not get closed.
+        /// 
+        /// This also lets us calculate Top 100 without downtime as we can be inclusive
+        /// of active tickets
+        /// </summary>
+        /// <param name="visit_ids"></param>
+        void Renew(IEnumerable<int> visit_ids);
+
+        /// <summary>
+        /// Purge data older than the date given
+        /// </summary>
+        /// <param name="days"></param>
+        void PurgeByDate(DateTime date);
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="start"></param>
+        /// <param name="end"></param>
+        /// <returns></returns>
+        IEnumerable<DbLotVisit> StreamBetween(int shard_id, DateTime start, DateTime end);
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="start"></param>
+        /// <param name="end"></param>
+        /// <returns></returns>
+        IEnumerable<DbLotVisitNhood> StreamBetweenPlusNhood(int shard_id, DateTime start, DateTime end);
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="start"></param>
+        /// <param name="end"></param>
+        /// <returns></returns>
+        IEnumerable<DbLotVisitNhood> StreamBetweenOneNhood(uint nhood_id, DateTime start, DateTime end);
+
+
+    }
+}