Add missing translations

src/Wallabag/CoreBundle/Resources/translations/messages.es.yml

@@ -341,6 +341,10 @@ import:
     wallabag_v2:
         page_title: 'Importar > Wallabag v2'
         description: 'Va a importar sus artículos de otra instancia de wallabag v2. Vaya a Todos los artículos, entonces, en la barra lateral, oprima en "JSON". Usted tendrá un fichero "All articles.json"'
+    readability:
+        page_title: 'Importar > Readability'
+    #     description: 'This importer will import all your Readability articles. On the tools (https://www.readability.com/tools/) page, click on "Export your data" in the "Data Export" section. You will received an email to download a json (which does not end with .json in fact).'
+    #     how_to: 'Please select your Readability export and click on the below button to upload and import it.'
 
 developer:
     page_title: 'Promotor'