Refactor #5580: Add new file&directory apis into FileUtils
Refactor #5580: Fix Win32 compile issue
Refactor #5580: Fix some issues
Refactor #5580: Add test case for FileUtils' file and directory manipulations
Merge branch 'v3' of git://github.com/cocos2d/cocos2d-x into FileUtils_FILE_API
Refactor #5580: Make isDirectoryExist support relative path
Refactor #5580: Refactor Hungary style code in test case
Refactor #5580: Improve createDirectories
Refactor #5580: Merge createDirectories to createDirectory
Merge pull request #7188 from pandamicro/FileUtils_FILE_API

Refactor #5580: Add new file&directory apis into FileUtils and test cases