modify create new project docs
Merge branch 'master' into feature/quickdocs
Merge pull request #317 from htlxyz/feature/quickdocs

modify create new project docs
add AppDelegate modification
add patch download for cocos2d-x 3.1
Update zh.md
Merge pull request #318 from joshuastray/master

add AppDelegate modification
Added mp3 format of audios and effects for browsers compatibility.
Merge pull request #320 from linshun/master

Added mp3 format of audios and effects for browsers compatibility.
Changed default audio format from ogg to mp3.
Merge pull request #321 from linshun/master

Changed default audio format from ogg to mp3 for iOS and Mac
modify some quick how to docs
Merge pull request #322 from htlxyz/feature/quickdocs

modify some quick how to docs
add reference
Merge branch 'master' of github.com:chukong/cocos-docs
Merge pull request #323 from dualface/master

add reference
Merge branch 'master' of github.com:chukong/cocos-docs
move
Merge pull request #324 from dualface/master

move
Merge pull request #319 from honghui/master

add patch download for cocos2d-x 3.1