Moves most service interfaces, ensure IOHelper is registered

src/Umbraco.Core/CompositionExtensions_Essentials.cs

@@ -1,5 +1,6 @@
 using Umbraco.Core.Cache;
 using Umbraco.Core.Composing;
+using Umbraco.Core.IO;
 using Umbraco.Core.Logging;
 using Umbraco.Core.Persistence;
 
@@ -19,7 +20,8 @@ namespace Umbraco.Core
             AppCaches appCaches,
             IUmbracoDatabaseFactory databaseFactory,
             TypeLoader typeLoader,
-            IRuntimeState state)
+            IRuntimeState state,
+            IIOHelper ioHelper)
         {
             composition.RegisterUnique(logger);
             composition.RegisterUnique(profiler);
@@ -30,6 +32,7 @@ namespace Umbraco.Core
             composition.RegisterUnique(factory => factory.GetInstance<IUmbracoDatabaseFactory>().SqlContext);
             composition.RegisterUnique(typeLoader);
             composition.RegisterUnique(state);
+            composition.RegisterUnique(ioHelper);
         }
     }
 }