Add WPFUi to prevent stuck state

Add Range to TournamentService
Use DataTable to export CSV
DataTable can be ordered on Total

LaDOSE.Src/LaDOSE.DTO/TimeRangeDTO.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace LaDOSE.DTO
+{
+    public class TimeRangeDTO
+    {
+        public DateTime? From { get; set; }
+        public DateTime? To { get; set; }
+    }
+}