Removes the old Log/ILog along with the concept of an ExternalLogger, updates the IAuditService to handle what the Log used to do

src/Umbraco.Core/Persistence/Mappers/AuditItemMapper.cs

@@ -0,0 +1,32 @@
+using System.Collections.Concurrent;
+using Umbraco.Core.Models;
+using Umbraco.Core.Models.Rdbms;
+using Umbraco.Core.Persistence.SqlSyntax;
+
+namespace Umbraco.Core.Persistence.Mappers
+{
+    [MapperFor(typeof(AuditItem))]
+    public sealed class AuditItemMapper : BaseMapper
+    {
+        private static readonly ConcurrentDictionary<string, DtoMapModel> PropertyInfoCacheInstance = new ConcurrentDictionary<string, DtoMapModel>();
+        
+        public AuditItemMapper(ISqlSyntaxProvider sqlSyntax) : base(sqlSyntax)
+        {
+        }
+
+        internal override ConcurrentDictionary<string, DtoMapModel> PropertyInfoCache
+        {
+            get { return PropertyInfoCacheInstance; }
+        }
+
+        protected override void BuildMap()
+        {
+            CacheMap<AuditItem, LogDto>(src => src.Id, dto => dto.Id);
+            CacheMap<AuditItem, LogDto>(src => src.Comment, dto => dto.Comment);
+            CacheMap<AuditItem, LogDto>(src => src.AuditType, dto => dto.Header);
+            CacheMap<AuditItem, LogDto>(src => src.UserId, dto => dto.UserId);
+            CacheMap<AuditItem, LogDto>(src => src.CreateDate, dto => dto.Datestamp);
+        }
+        
+    }
+}