Moved application code to the Application layer

Imported Win10 project
Code cleanup
WIP - Use common UWP services for Win8.1 and Win10

ModernKeePass.Domain/Interfaces/IImportFormat.cs

@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace ModernKeePass.Domain.Interfaces
+{
+    public interface IImportFormat
+    {
+        Task<List<Dictionary<string, string>>> Import(string path);
+    }
+}