data refactor (#27)

* Refactoring to move data access code into Infrastructure project

* Fixing namespaces

src/Web/Interfaces/ICatalogService.cs

@@ -0,0 +1,14 @@
+using Microsoft.AspNetCore.Mvc.Rendering;
+using Microsoft.eShopWeb.ViewModels;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Microsoft.eShopWeb.Services
+{
+    public interface ICatalogService
+    {
+        Task<Catalog> GetCatalogItems(int pageIndex, int itemsPage, int? brandID, int? typeId);
+        Task<IEnumerable<SelectListItem>> GetBrands();
+        Task<IEnumerable<SelectListItem>> GetTypes();
+    }
+}