Separation of core library from the UWP app.

Wino.Core.Domain/Interfaces/IContactService.cs

@@ -0,0 +1,14 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using MimeKit;
+using Wino.Core.Domain.Entities.Shared;
+
+namespace Wino.Core.Domain.Interfaces
+{
+    public interface IContactService
+    {
+        Task<List<AccountContact>> GetAddressInformationAsync(string queryText);
+        Task<AccountContact> GetAddressInformationByAddressAsync(string address);
+        Task SaveAddressInformationAsync(MimeMessage message);
+    }
+}