Update zh.md
Create zh.md

translate the article from English to Chinese
Create zh.md

translate the article about Value while is new data type in v3.0 from English to Chinese.
Update zh.md
Create zh.md

transalte the article about Map which is new data type in v3.0 from English to Chinese
Update zh.md

add link to Map<K,V> and Value type of data structure for v3.0
Merge pull request #109 from huanghws2013/master

Translate three articles for new data structure in v3.0