Standardize namespaces to all be under the Microsoft.eShopOnWeb namespace and update default namespaces. (#102)

src/Web/Extensions/EmailSenderExtensions.cs

@@ -1,8 +1,8 @@
-using ApplicationCore.Interfaces;
+using Microsoft.eShopWeb.ApplicationCore.Interfaces;
 using System.Text.Encodings.Web;
 using System.Threading.Tasks;
 
-namespace Microsoft.eShopWeb.Services
+namespace Microsoft.eShopWeb.Web.Services
 {
     public static class EmailSenderExtensions
     {

src/Web/Extensions/UrlHelperExtensions.cs

@@ -1,4 +1,4 @@
-using Microsoft.eShopWeb.Controllers;
+using Microsoft.eShopWeb.Web.Controllers;
 
 namespace Microsoft.AspNetCore.Mvc
 {