Commit before merge. Updates to source device usage triggers based on room source routing

Essentials Core/PepperDashEssentialsBase/Devices/IUsageTracking.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using Crestron.SimplSharp;
+using PepperDash.Core;
 
 namespace PepperDash.Essentials.Core
 {
@@ -70,6 +71,7 @@ namespace PepperDash.Essentials.Core
 
             if (handler != null)
             {
+                Debug.Console(1, "Device Usage Ended at {1}.  In use for {2} minutes.", UsageEndTime, timeUsed.Minutes);
                 handler(this, new DeviceUsageEventArgs() { UsageEndTime = UsageEndTime, MinutesUsed = timeUsed.Minutes });
             }
         }