MicrosoftConsoleLayoutRenderer - For Hosting Lifetime Startup Messages

[snakefoot]

Resolves #489 so you can do this:

<nlog>
  <targets>
    <target name="lifetimeConsole" xsi:type="Console" layout="${MicrosoftConsoleLayout}"  />
  </targets>
  <rules>
     <logger name="Microsoft.Hosting.Lifetime" level="Info" writeTo="lifetimeConsole" final="true" /> 
  </rules>
</nlog>

[304NotModified]

@snakefoot

I was checking the code coverage, then I saw line 32. I that correct? Why do we parse the int, but don't use the value? Not sure if that can be right

[snakefoot]

If EventId_Id was a string then it would parse and use the int-value. But I guess this int.TryParsefallback is rather unnecessary.

[snakefoot]

Created wiki: https://github.com/NLog/NLog/wiki/MicrosoftConsoleLayout