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

src/Web/Views/Manage/ManageNavPages.cs

@@ -2,7 +2,7 @@
 using Microsoft.AspNetCore.Mvc.Rendering;
 using Microsoft.AspNetCore.Mvc.ViewFeatures;
 
-namespace Microsoft.eShopWeb.Views.Manage
+namespace Microsoft.eShopWeb.Web.Views.Manage
 {
     public static class ManageNavPages
     {

src/Web/Views/Manage/_ViewImports.cshtml

@@ -1 +1 @@
-@using Microsoft.eShopWeb.Views.Manage
+@using Microsoft.eShopWeb.Web.Views.Manage