Add IGet HTTP Verb Markers

Author: mythz

src/Northwind.ServiceModel/CachedOperations.cs

@@ -1,24 +1,21 @@
 using ServiceStack;
-using System.Runtime.Serialization;
 
 namespace Northwind.ServiceModel
 {
     [Route("/cached/customers"), Tag(Tags.Cached)]
-    public class CachedGetAllCustomers : IReturn<CustomersResponse> {}
+    public class CachedGetAllCustomers : IGet, IReturn<CustomersResponse> {}
 
-    [DataContract]
     [Route("/cached/customers/{Id}"), Tag(Tags.Cached)]
-    public class CachedGetCustomerDetails : IReturn<CustomerDetailsResponse>
+    public class CachedGetCustomerDetails : IGet, IReturn<CustomerDetailsResponse>
     {
-        [DataMember]
         public string Id { get; set; }
     }
 
     [Tag(Tags.Cached)]
     [Route("/cached/orders")]
     [Route("/cached/orders/page/{Page}")]
     [Route("/cached/customers/{CustomerId}/orders")]
-    public class CachedGetOrders : IReturn<OrdersResponse>
+    public class CachedGetOrders : IGet, IReturn<OrdersResponse>
     {
         public int? Page { get; set; }
         public string CustomerId { get; set; }

src/Northwind.ServiceModel/GetAllCustomers.cs

@@ -6,7 +6,7 @@
 namespace Northwind.ServiceModel
 {
     [Route("/customers"), Tag(Tags.Customers)]
-    public class GetAllCustomers : IReturn<CustomersResponse> {}
+    public class GetAllCustomers : IGet, IReturn<CustomersResponse> {}
 
     [DataContract]
     public class CustomersResponse : IHasResponseStatus

src/Northwind.ServiceModel/GetCustomerDetails.cs

@@ -6,7 +6,7 @@
 namespace Northwind.ServiceModel
 {
     [Route("/customers/{Id}"), Tag(Tags.Customers)]
-    public class GetCustomerDetails : IReturn<CustomerDetailsResponse>
+    public class GetCustomerDetails : IGet, IReturn<CustomerDetailsResponse>
     {
         public string Id { get; set; }
     }

src/Northwind.ServiceModel/GetOrders.cs

@@ -9,7 +9,7 @@ namespace Northwind.ServiceModel
     [Route("/orders")]
     [Route("/orders/page/{Page}")]
     [Route("/customers/{CustomerId}/orders")]
-    public class GetOrders : IReturn<OrdersResponse>
+    public class GetOrders : IGet, IReturn<OrdersResponse>
     {
         public int? Page { get; set; }
         public string CustomerId { get; set; }