Merge remote-tracking branch 'origin/netcore/dev' into netcore/feature/AB6233-install-steps-in-dotnet-core

# Conflicts:
#	src/Umbraco.Infrastructure/Runtime/CoreInitialComposer.cs
#	src/Umbraco.Web.Common/Runtime/AspNetCoreComposer.cs

src/Umbraco.Web.Common/Controllers/RenderController.cs

@@ -0,0 +1,9 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace Umbraco.Web.Common.Controllers
+{
+    public abstract class RenderController : Controller
+    {
+
+    }
+}