replace wrong links.
Merge pull request #107 from Ivenyang/master

replace wrong links.
Merge pull request #106 from u0u0/master

Fix url error in release note, remove duplicate article.
fixed #3675, add english article for WebSocket.
Merge pull request #108 from u0u0/master

fixed #3675, add english article for WebSocket.
Merge branch 'master' of https://github.com/cocos2d/cocos-docs
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
update the version of the label picture

CC prefix should be version 2.x and without CC prefix is v3.0
issue #3811, add sample code for iOS StoreKit intergation in C++ and JSB
issue #3811, document of iOS StoreKit integration in C++
issue #3811, document of iOS StoreKit integration in JSB.
fixed #3811, fix spell error.
Merge pull request #111 from u0u0/master

fixed #3811,  JavaScript Binding of iOS In-App-Purchase
fixed #3811, update catalog.