Add translation files importer in DE/EN

The new importer at imports.museum-digital.org is hence now
multilingual. Also, two new translation fields were added to the
dashboard of museum-digital.org.

importer/de/importer-success.json

@@ -0,0 +1,19 @@
+{
+    "tlImporterSuccess": {
+        "Success": "Erfolg!",
+        "warnings": "Warnungen",
+        "general": "Generelles",
+        "download_as_csv": "Als <abbr title=\"Comma-Separated Values\">CSV<\/abbr>-Datei exportieren",
+        "norm_data": "Kontrollierte Vokabulare",
+        "too_short": "Der Eintrag des Textfeldes ist zu kurz",
+        "context": "Kontext",
+        "Message": "Nachricht",
+        "Context": "Kontext",
+        "Entity Name": "Entity Name",
+        "Additional Note": "Additional Note",
+        "ID in Context": "Entry ID",
+        "Entity_Name": "Eintragsname \/ Inventarnummer",
+        "Additional_Note": "Zus\u00e4tzliche Notiz",
+        "ID_in_Context": "Eintrags-ID"
+    }
+}

importer/de/importer.json

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+{
+    "tlImporter": {
+        "select_instance": "In welches museum-digital soll importiert werden?",
+        "username_password": "Benutzername \/ Passwort",
+        "username": "Benutzername",
+        "password": "Passwort",
+        "authenticate": "Authentifizieren",
+        "select_institution": "F\u00fcr welche Institution importieren?",
+        "select_collection": "Alle Objekte in eine bestimmte Sammlung importieren?",
+        "select_module": "Welches Importer-Modul soll verwendet werden?",
+        "by": "Von",
+        "see": "Siehe",
+        "select_data_folder": "Die zugeordneten Ressourcen (nicht die Thumbs) befinden sich im Ordner?",
+        "select_import_to_do": "W\u00e4hlen Sie den durchzuf\u00fchrenden Import aus ...",
+        "select_visibility": "Sichtbar importieren?",
+        "import_to_public": "\u00d6ffentlich importieren",
+        "import_to_not_public": "Unsichtbar importieren",
+        "submit": "Abschicken",
+        "no_of_files": "Number of files: ",
+        "no_images_ignore": "Keine Abbildungen \/ Abbildungen ignorieren",
+        "from_file": "Aus Datei"
+    }
+}