add en.md
Merge branch 'master' of https://github.com/cocos2d/cocos-docs
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.
Merge branch 'master' of https://github.com/cocos2d/cocos-docs
Merge pull request #112 from u0u0/master

Update catalog, add iOS StoreKit integration
Merge pull request #110 from huanghws2013/master

update the version on the bottom of the label picture
fixed #3811, change documents position.
Merge branch 'master' of https://github.com/cocos2d/cocos-docs
Merge pull request #113 from u0u0/master

fixed #3811, change documents position.
Merge branch 'master' of https://github.com/cocos2d/cocos-docs
modify the thirdSDK In WP8
Merge pull request #114 from koowolf/adcontrol

modify the thirdSDK In WP8
issue #3837:Add a document for describing how to use ZeroBrane Studio for lua debug
add zh doc for remote debug lua via ZeroBrane Studio