Basic CSV Import working

ModernKeePass/ImportFormats/NullImportFormat.cs

@@ -1,13 +1,16 @@
 using Windows.Storage;
 using ModernKeePass.Interfaces;
+using System;
+using System.Threading.Tasks;
+using System.Collections.Generic;
 
 namespace ModernKeePass.ImportFormats
 {
     public class NullImportFormat: IFormat
     {
-        public IPwEntity Import(IStorageFile source)
+        public Task<List<Dictionary<string, string>>> Import(IStorageFile source)
         {
-            throw new System.NotImplementedException();
+            throw new NotImplementedException();
         }
     }
 }