Log version information on startup.

ATxDiagnostics/ATxDiagnostics.cs

 using System;
 using System.Diagnostics;
 using System.Management;
+using System.Reflection;
 using ATxCommon;
 using ATxCommon.Monitoring;
 using NLog;
@@ -29,6 +30,10 @@ namespace ATxDiagnostics
             logConfig.LoggingRules.Add(logRuleConsole);
             LogManager.Configuration = logConfig;
 
+            var commonAssembly = Assembly.GetAssembly(typeof(ATxCommon.Monitoring.Cpu));
+            var commonVersionInfo = FileVersionInfo.GetVersionInfo(commonAssembly.Location);
+            Log.Info("ATxCommon library version: {0}", commonVersionInfo.ProductVersion);
+
             Log.Debug("Free space on drive [C:]: " + Conv.BytesToString(SystemChecks.GetFreeDriveSpace("C:")));
             var cpu = new Cpu {
                 Interval = 250,