Refactoring Services (#61)

* Refactoring ViewModels into Razor Pages models

* Cleaning up Basket viewcomponent

* Refactoring services.
Fixed bug in basket item counter.

src/Web/Interfaces/IBasketService.cs

@@ -1,15 +1,10 @@
 using Microsoft.eShopWeb.ViewModels;
-using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace Microsoft.eShopWeb.Interfaces
 {
-    public interface IBasketService
+    public interface IBasketViewModelService
     {
         Task<BasketViewModel> GetOrCreateBasketForUser(string userName);
-        Task TransferBasketAsync(string anonymousId, string userName);
-        Task AddItemToBasket(int basketId, int catalogItemId, decimal price, int quantity);
-        Task SetQuantities(int basketId, Dictionary<string, int> quantities);
-        Task DeleteBasketAsync(int basketId);
     }
 }