Update display.lua

修复display.printscreen方法中调用不存在的类newFSprite的报错
Merge pull request #313 from jekhy/develop

Update display.lua
Merge pull request #314 from htlxyz/feature/remove_deprecated_function

Feature/remove deprecated function
move
Merge branch 'develop' of github.com:chukong/quick-cocos2d-x into develop
cleanup