Update Chinese (Simplified) ISO 639-1 code

README.md

@@ -6,7 +6,7 @@ A Minimalist Text Adventure Game
 [Click to play](http://adarkroom.doublespeakgames.com/)
 
 [
-  [Chinese](http://adarkroom.doublespeakgames.com/?lang=cn)   |
+  [Chinese](http://adarkroom.doublespeakgames.com/?lang=zh_cn)  |
   [French](http://adarkroom.doublespeakgames.com/?lang=fr)      |
   [German](http://adarkroom.doublespeakgames.com/?lang=de)      |
   [Italian](http://adarkroom.doublespeakgames.com/?lang=it)     |

lang/langs.js

@@ -1,5 +1,4 @@
 var langs = {
-	'cn':'简体中文',
 	'de':'deutsch',
 	'en':'english',
 	'es':'español',
@@ -10,5 +9,6 @@ var langs = {
 	'ru':'русский',
 	'sv':'svenska',
 	'tr':'türkçe',
-	'uk':'українська'
+	'uk':'українська',
+	'zh_cn':'简体中文'
 };