Fixed retina/contentScale position errors for iPhone 6+ devices in EditBox.

Problem is that factor was 1.0 or 2.0 until iOS 8 introduced 3.0.
Merge pull request #1 from cocos2d/v3

Update from cocos2d-x
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
Remove useless copy about luasocket on the android platform
ListViewReader completed and listview callback feature.
Add interface that create node with flat buffers object for simulator
Merge branch 'v3' into fixEditBox_v3
fix EditBox move animation position is wrong on iPhone6 Plus
Update reader
1. ListView demo compeleted.
2. Optimized ListViewReader format.
Update RELEASE_NOTES.md

change `Cocostudio Reader` to `Cocos Studio Reader`
Update RELEASE_NOTES.md

 `ClippingRectangNode` to `ClippingRectangleNode, 
`effecient` to `efficient`
Update RELEASE_NOTES.md
Update RELEASE_NOTES.md
Update RELEASE_NOTES.md

`trianle command` to `triangle command`
Update RELEASE_NOTES.md

'Reskin' to `Reskin`
'Attachment' to `Attachment`
'Better support for FBX' to `Better support for FBX`
etc.
Update RELEASE_NOTES.md

fix more typos.
Merge pull request #9411 from pipu/v3_reader_update

V3 reader update