Add Chinese Translation (#345)

* Chinese Translation

I have made a Chinese Translation which contains both Simplified and
Traditional.But I donk't know what the heck is going on.
Now the Simplied one works perfectly but the Tradinional one cannot work
at all,It will turns to English......

* Some Fixes

app/src/main/res/values/arrays.xml

@@ -21,9 +21,11 @@
             <item>Default</item>
             <item>English</item>
             <item>Italiano</item>
-            <item>Japanese</item>
+            <item>日本語</item>
             <item>Русский</item>
             <item>Nederlands</item>
+            <item>中文(简体)</item>
+            <item>中文(繁體)</item>
             <item>Korean</item>
             <item>Español</item>
     </string-array>
@@ -34,6 +36,8 @@
             <item>ja</item>
             <item>ru</item>
             <item>nl</item>
+            <item>zh-CN</item>
+            <item>zh-TW</item>
             <item>ko</item>
             <item>es</item>
     </string-array>