Added NightAlert project for travel kit

NightScout/Alerters/ConsoleAlerter.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NightScout
+{
+    public class ConsoleAlerter : IAlerter
+    {
+
+        public void StartAlert()
+        {
+            Console.WriteLine("Alerting");
+        }
+
+        public void StartUrgentAlert()
+        {
+            Console.WriteLine("Urgent Alerting");
+        }
+
+        public void StartStaleDataAlert()
+        {
+            Console.WriteLine("Stale Data Alerting");
+        }
+
+        public void StopAlerts()
+        {
+            Console.WriteLine("Alerts stopped");
+        }
+    }
+}