fix(service): add missing final event on new (async) translations

Relates #751 #733

src/service/translate.js

@@ -1715,6 +1715,7 @@ angular.module('pascalprecht.translate').provider('$translate', ['$STORAGE_KEY',
         if ($fallbackLanguage && $fallbackLanguage.length) {
           var processAsyncResult = function (translation) {
             translations(translation.key, translation.table);
+            $rootScope.$emit('$translateChangeEnd', { language: translation.key });
           };
           for (var i = 0, len = $fallbackLanguage.length; i < len; i++) {
             langPromises[$fallbackLanguage[i]] = loadAsync($fallbackLanguage[i]).then(processAsyncResult);