Refactoring and Adding Tests (#28)

* Introducing repository and refactoring services.
Changing entities to use int keys everywhere.

* Refactoring application services to live in web project and only reference repositories, not EF contexts.

* Cleaning up implementations

* Moving logic out of CatalogController
Moving entity knowledge out of viewmodels.

* Implementing specification includes better for catalogservice

* Cleaning up and adding specification unit tests

src/Web/Views/Catalog/Index.cshtml

@@ -1,6 +1,6 @@
 @{
     ViewData["Title"] = "Catalog";
-    @model Microsoft.eShopWeb.ViewModels.CatalogIndex
+    @model CatalogIndexViewModel
 }
 <section class="esh-catalog-hero">
     <div class="container">

src/Web/Views/Catalog/_pagination.cshtml

@@ -1,4 +1,4 @@
-@model Microsoft.eShopWeb.ViewModels.PaginationInfo
+@model PaginationInfoViewModel
 
 <div class="esh-pager">
     <div class="container">

src/Web/Views/Catalog/_product.cshtml

@@ -1,4 +1,4 @@
-@model Microsoft.eShopWeb.ApplicationCore.Entities.CatalogItem
+@model CatalogItemViewModel
 
 
 <form asp-controller="Cart" asp-action="AddToCart">
@@ -12,11 +12,11 @@
     <div class="esh-catalog-price">
         <span>@Model.Price.ToString("N2")</span>
     </div>
-    <input type="hidden" asp-for="@Model.CatalogBrand" name="brand" />
+    @*<input type="hidden" asp-for="@Model.CatalogBrand" name="brand" />
     <input type="hidden" asp-for="@Model.CatalogBrandId" name="brandId" />
     <input type="hidden" asp-for="@Model.CatalogType" name="type" />
     <input type="hidden" asp-for="@Model.CatalogTypeId" name="typeId" />
-    <input type="hidden" asp-for="@Model.Description" name="description" />
+    <input type="hidden" asp-for="@Model.Description" name="description" />*@
     <input type="hidden" asp-for="@Model.Id" name="id" />
     <input type="hidden" asp-for="@Model.Name" name="name" />
     <input type="hidden" asp-for="@Model.PictureUri" name="pictureUri" />