More modernization

- Split generic "common" libraries into specific libraries
- Use other packages in lieu of custom code
- General cleanup

Application/Options/UpdateOptionsPanel.xaml.cs

@@ -1,4 +1,4 @@
-using Common.Update;
+using CKaczor.ApplicationUpdate;
 
 namespace FeedCenter.Options
 {
@@ -34,4 +34,4 @@ namespace FeedCenter.Options
             UpdateCheck.DisplayUpdateInformation(true);
         }
     }
-}
+}