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

src/ApplicationCore/Services/UriComposer.cs

@@ -1,7 +1,7 @@
-using ApplicationCore.Interfaces;
+using Microsoft.eShopWeb.ApplicationCore.Interfaces;
 using Microsoft.eShopWeb;
 
-namespace ApplicationCore.Services
+namespace Microsoft.eShopWeb.ApplicationCore.Services
 {
     public class UriComposer : IUriComposer
     {