Added NightAlert project for travel kit

NightScout/Alerters/MultiAlerter.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NightScout
+{
+    public class MultiAlerter : IAlerter
+    {
+        public List<IAlerter> Alerters { get; set; }
+
+        public MultiAlerter(IEnumerable<IAlerter> alerters)
+        {
+            Alerters = new List<IAlerter>(alerters);
+        }
+        public void StartAlert()
+        {
+            Alerters.ForEach(a =>
+            {
+                try
+                {
+                    a.StartAlert();
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine(ex);
+                }
+            });
+
+        }
+
+        public void StartUrgentAlert()
+        {
+            Alerters.ForEach(a =>
+            {
+                try
+                {
+                    a.StartUrgentAlert();
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine(ex);
+                }
+            });
+        }
+
+        public void StartStaleDataAlert()
+        {
+            Alerters.ForEach(a =>
+            {
+                try
+                {
+                    a.StartStaleDataAlert();
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine(ex);
+                }
+            });
+        }
+
+        public void StopAlerts()
+        {
+
+            Alerters.ForEach(a =>
+            {
+                try
+                {
+                    a.StopAlerts();
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine(ex);
+                } 
+            });
+
+        }
+    }
+}