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/ar.json

@@ -1,10 +1,10 @@
 {
     "@metadata": {
-        "authors": {
-            "0": "Amire80",
-            "1": "DRIHEM",
-            "3": "ترجمان05"
-        }
+        "authors": [
+            "Amire80",
+            "DRIHEM",
+            "ترجمان05"
+        ]
     },
     "uls-select-language": "حدد اللغة",
     "uls-region-WW": "في جميع أنحاء العالم",

lib/jquery.uls/i18n/en.json

@@ -5,7 +5,7 @@
 	"locale": "en",
 	"message-documentation": "qqq"
 },
-"uls-select-language": "Select Language",
+"uls-select-language": "Select language",
 "uls-region-WW": "Worldwide",
 "uls-region-SP": "Special",
 "uls-region-AM": "America",

lib/jquery.uls/i18n/nl-informal.json

@@ -0,0 +1,15 @@
+{
+    "@metadata": {
+        "authors": [
+            "Carsrac"
+        ]
+    },
+    "uls-select-language": "Kies taal",
+    "uls-region-WW": "Wereldwijd",
+    "uls-region-SP": "Speciaal",
+    "uls-region-AM": "Amerika",
+    "uls-region-AF": "Afrika",
+    "uls-region-EU": "Europa",
+    "uls-region-AS": "Azië",
+    "uls-region-ME": "Midden-Oosten"
+}

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"