Move relevant methods from Title to Entry

src/routes/api.cr

@@ -80,7 +80,7 @@ class APIRouter < Router
         if !entry_id.nil?
           entry = title.get_entry(entry_id).not_nil!
           raise "incorrect page value" if page < 0 || page > entry.pages
-          title.save_progress username, entry.title, page
+          entry.save_progress username, page
         elsif page == 0
           title.unread_all username
         else