Updating from ULS upstream

* Localization updates.
* Added localization for Dutch informal.
* Performance improvements - see
  https://github.com/wikimedia/jquery.uls/pull/122

Change-Id: I6a76097722ae7ab2774172838823d73da5050581

lib/jquery.uls/i18n/zh-hans.json

@@ -15,7 +15,7 @@
     "uls-region-ME": "中东",
     "uls-region-PA": "太平洋",
     "uls-no-results-found": "无搜索结果",
-    "uls-common-languages": "常见语言",
+    "uls-common-languages": "常用语言",
     "uls-no-results-suggestion-title": "你可能感兴趣：",
     "uls-search-help": "你可以按语言名称、文字名称、语言的ISO代码搜索，或按地区浏览：",
     "uls-search-placeholder": "语言搜索"