Fixes up all logging. Configures serilog logging to replace MS logging just like serilog does, adds new ILoggerConfiguration so we aren't hard coding things, dynamically adds enrichers when the container is ready to resolve services.

src/Umbraco.Core/Logging/ILoggingConfiguration.cs

@@ -0,0 +1,13 @@
+namespace Umbraco.Core.Logging
+{
+
+    public interface ILoggingConfiguration
+    {
+        /// <summary>
+        /// The physical path where logs are stored
+        /// </summary>
+        string LogDirectory { get; }
+        string LogConfigurationFile { get; }
+        string UserLogConfigurationFile { get; }
+    }
+}