Add controler actions to return stats for

the current season

Back/skydiveLogs-api/DataContract/StatisticForLastMonthResp.cs

@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+
+namespace skydiveLogs_api.DataContract
+{
+    public class StatisticForLastMonthResp
+    {
+        public IEnumerable<StatisticResp> ByDz { get; set; }
+
+        public IEnumerable<StatisticResp> ByJumpType { get; set; }
+    }
+}